the "buffer" material also acts as an insulator for the stone so that you do not need to insulate the lid. I did small scale heat treating in a slow cooker with decent success but I never added anything to insulate the lid since I used fine grained sand as a buffer material.
The cooling down period is very obvious to welders, ceramicists, and glass blowers. No need to explain why. I am of the former and latter. Cast metal welding requires a long insulated cool down. Why? It will crack and undo all your hard work. Simple. Thanks Pat.
@@JessieGriffey-bo3yx I've asked that before, I personally haven't tried. I believe the response was "yes you can but the limestone has to be of good quality and it takes a really high temperature. To temper"
Thanks for replying always have here in Saltville Virginia my whole lot of limestone and sandstone thanks thanks for a drink thanks a lot but Bud I sure appreciate it
I know this is an ancient video, but its about Turkey roasters. I bought some " Primo Texas Flint" online. I thought it was spalls, like the pics showed. It is one batch of reddish river roxk(round) about 3"-4". Another batch of shiny grey, blue rock. It is hard as granite! I thought I could heat treat it. If I have to put whole pieces in turkey roaster what can you tell me to help! The shit is absolutely worthless for knapping as is, unlike description online which said " flint knapping"! Con artists!!
I just ordered two boxes of "primo" rocks from Ebay. I'll be doing a video on heat treating them when they arrive in about a week. In the meantime, I will be doing a deep dive into heat treating on other batches this coming week. I have a lot of experience turning crap stone into nice stone using heat treating. You can heat entire nodules if you want. The lighter colors work best. Don't go over 400°F unless the stuff is absolute concrete. In that case, you can go up to 500°F. The darker colors have a bad habit of breaking apart if you go over 325°F.
I've learned alot watching your videos and I'm a far better knapper now and I'm not destroying my hands and wrist ,every so often I make abo pieces to demonstrate for a youngster and I show the the direct percussion technique that I learned from you .,I work with them for a weekend and let them know they can come here anytime. I'm 54 and I enjoy teaching young people
I forgot to put the drop cloth on it. It was 4am when I turned it to zero. I put one on when I woke up. Hope I didn't mess my rocks up. It's cooling as I type. It's 12:20 and it's still warm. I guess I'll see. Thanks for your instructions Patrick.
No big deal. The dropcloth over the top is mainly to prevent drafts or breezes from changing the air temp too fast. It's not a problem if the roaster is inside and there's no fan in the room.
I'm finally cooking myself, good thing cause I was starting to drowned in rock. After watching many videos one of the things everyone seems to forget is the impact of ambient temperature. Your drop cloth idea addresses this. I'm sure it matters where you use the roaster. Right now the shed I'm using will be 120 all day, (Texas) not the same experience in Dakotas or Idaho. I would imagine a cool concrete floor or a shady breezy cool spot would always fight you trying to cool off gradually.
Watched another knapper a few yrs ago cook with sand, yadda, yadda. You rock with this vid. When I get cranked back up again(after march Silver Springs knap-in), I will buy raw and cook my own. I will check online for temps b4 I buy and that will be my guide. I bought a turkey roaster after that vid yrs ago and never used it. My daughter has it for Thanksgiving turkey. Lots of thrift stores so I will get another(or 2)(1 for backup). Thanks for the vid. It's gonna be a great help. Hope you get a notification on this message because I wanted you to know that you just saved me some money. :)
Yes, you can use your kitchen oven. Not a dumb question. The only problem you might encounter is a strange smell coming off the rocks as they are being heated. The smell is usually earthy or petroleum-like.
Excellent video my friend! Good news for me! My wife gave me the go ahead to use her older turkey roaster. (500°) During this process do you ever take the lid off to check on the rocks being cooked? Thanks again for sharing your knowledge on flintknapping. Take care my friend......
Those stones will probably require more heat than a turkey roster can provide. Montana Agate might need up to 500F and Ohio Flint Ridge might need up to 675F. www.pugetsoundknappers.com/how_to/Heat%20Treating%20Guide%20with%20Table.html
great video crafty, thanks for the time you put into these. This saves a lot of trial and error. will heat treating further help stone that is claimed to be already treated?
I just bought my roaster today. My question is can I cook flint with the cortex on.......the material I have been harvesting is fist size the size of potatoes. Should I slab it first then cook or grind off the cortex. I have learned all I know from your videos and trial and error. Thanks Jack!!!!
Good info have my first batch in right now. I found a roaster that goes up to 500 at an estate sale the other day, CHEAP. Thanks for all your videos and info.
+JackCrafty Quick question. I have heard of people using thick Styrofoam insulation around the cooker. Not tight fit but about 3" or so all the way around. Some used the type with a reflective backing putting the reflective side in. Will this help keep the heat in and or not? I know you can use it when making a bow heating bow.
Mr. Crafty, thank you for the advice on the root beer material, I’ve recently acquired some Pedernales amoeba, and I was wondering if/how should I heat treat it?
Start with low heat ( 300 degrees F) and if it doesn't seem easy enough to chip ( after you let it cool for 12 hours), you can heat it again at 325 degrees F, and so on, with a rise of 25 degrees for each attempt. It doesn't matter how many times a stone is heated and cooled.
Thanks for this video. When I put the stone into the roaster to dry for 24 hours on 200, can I put the entire round cobble in with intact cortex, or do I need to try to spall out the stone then heat treat? I'm finding some sweet looking chert 10 minutes from my house, but it is either pieces that have already sheared off the parent boulder or cobble, or it is an entire cobble with intact chalky cortex. The largest material I'm finding that I can get without having to dig/extricate is about the size of a vollyball and roughly the same dimensions...ie round. I don't want to screw it up by blasting away on it raw and getting a bunch of steppy screwed up fragments, so I'd rather heat treat the whole shebang before hitting it at all, but I all the vids I see, folks are sticking spalls into the cooker...not whole rocks with cortex intact. I just dont want to do something that is going to cause damage my basement/family. Thanks, Eric
You can heat entire cobbles with cortex and everything but you will need to heat it very slowly and cool it very slowly. You can try starting at 200F and then ramp up the heat by 10F every hour until you reach 350F and let it cook for 24 hours and then cool it down by 10F per hour. See if that works. If not, you'll need to spall it. Volleyball size cobbles are really risky.
Cool! I’ll give it a try with a couple of the big rocks, as it looks like I’ve been blessed with a gracious plenty knappable rock just up the road! If they do something funky, I’ll figure out how to spall the rest. I have no clue as to the specific type of chert I’m finding. From outside in not including the cortex, most is grey then black, some is solid grey, some is solid black, some is black with light specks evenly throughout, and some is tan/beige. The solid grey is more grainy than the other rocks that seem to be very smooth and glossy. Is there any particular quality of a stone that indicates to you that it needs to be heated at higher temps or for longer periods of time given you don’t know exactly what it is? Thanks again for sharing your wisdom, and I won’t bug you on this subject beyond this!
@@ssrhythm6923 A good rule is the grainier and duller the stone, the more heat it needs. Obviously, the shinier it is, chances are it will work well without heat.
I just stumbled upon your videos, and I'm loving them so far. For your insulation on your lid, have you ever looked in to Kaowool or ceramic blanket along with Rigidizer? They're used for lining foundries and can withstand up to 2000-3000 degrees F. I I think that would work very good for what you do and would contain the temp the entire time and not let heat escape. Now, as far as testing the rock to feel for it "being right," what type of feel are you going for? Is it supposed to feel soft, or able to chip away little layers by hand, etc. I wouldn't mind getting in to this. Seems like a great hobby. What do you do with your points? Is it something just for collecting, or do you attempt to sell them, etc. Is everything experimental, or are you well informed of how various native americans used their stone tools. What they used each tool for, etc. I'm not sure if you discuss these things in other vids, but I'll keep watching!
Hello Rodney. I've never tried the insulation you mentioned but it sounds like it will work fine. The "feel" pertains the how easy it will chip. The easier the better. I make arrowheads because I want to understand what the capabilities of our ancestors were and how our brains developed. I also make arrowheads because it is a satisfying hobby. I don't sell very many but I could. I mostly give them away. I have some knowledge of ancient stone tools and I read a lot or archaeological studies but I have learned most of what I know by actually making the arrowheads and trying to find various ways of achieving the same results as the ancient knappers.
Good question. Actually, I don't. But here's a good rule: your tools will attack heated treated stone and you will most likely win. Raw stone will attack your tools and you will most likely lose.
I try to include the removal of turtle backs in almost all my videos. I wish I had a list of videos and the specific time stamps for each turtle back removal but I don't have enough time for that. :-)
another fantastically informative video! im currently looking for a turkey roaster... i've heard the older ones are the way to go. more reliable and consistent temps from what i hear. do you know anything about that or should i stop waiting to find an old one, and just buy a new one? i cant wait to feel the difference of heat treated stone.
just go out and buy one. it will last longer than a used one and probably perform better. I had lots of trouble with the temperature dial on my last used one.
+JackCrafty quick question before my first batch. that painters cloth you cover the roaster with... do you only use that in the cool down stage or throughout the entire process?
I finally found a cheap used turkey toaster that works at a thrift store so I’m gonna start experimenting with heat treating now. Also I have some spalled chert that’s peen sitting in my backyard for a few months in the intense Texas heat should I dry that stuff out for the whole 24 hours or should I just gradually bring the temperature up to 400?
Great video. Question,,,,can you cook smaller flakes? Most rocks I’ve seen cooked are bigger and I haven’t seen a lot of smaller flakes. If you can cook smaller flakes would the time be shorter since they are smaller?
probably a Micron Pen - look at art stores - soe people like to use a clear glue or nail polish and apply a small space on the rock with it. once it dries you can use your fine tip pen/marker to write on the dried nail polish. you can remove both of these with 90% alcohol, so it is a reversible process.
I'm gonna get one and try it out. I have a good amount of stone that has slick brown cortex and light grey color inside. Very grainy but I'm hoping it will Cook. It's from central TX . Do you know what that stone is called?
It should heat just fine, but spall it into flakes first or it may blow up. Some will blow up anyway, no matter what you do, because this is not just one variety of chert (all the nodules with the slick brown cortex will be different inside) and it can be very unpredictable.
@@KnapperJackCrafty Thank you so much I was at the local DQ today and noticed they had a rock bed that looked like it had some stone in it that looked the same. I'll check out the video. Appreciate it.
+HillbillysNdaBush Nice! Flint ridge is awesome material. I assume you got the recipe for it? I'm not sure but I think flint ridge needs a lot of heat....
How did the rock turn out? Flintridge is some of the hardest rock I have ever hit. But man is it pretty. I have only ever quarried it once and was dead after. My body has never hurt so much. I will only ever buy it again. It was just too much work for me. But I likely did not have the right tools.
Yes, it does matter what type they are but just try heating them and see how they knap. If you don't have very many stones and you don't want to waste them, knock of a flake from each stone and heat treat the flakes to see if they respond to the heat.
Yes, you can use an oven but sometimes there will be unpleasant or strange odors coming from the rock as it's heated. I doubt that there will be toxic fumes, but I'm not an expert on the subject.
sounds good..are whole chert nodules okay to cook or would spalls be better...i got a couple softball size nodules...i would like to cook whole before tring to get at them....
Aint found any bigger than a baseball or softball size yet being a new guy just learning to identify chert or chert sources...looking in deep road cuts and rock creek beds..in missouri..got one nodule from a rock shop..rest found
Texas rootbeer usually does well with low heat: preheat/dry at 250 degrees F for at least 24 hours, then 325 degrees F for 3 to 4 hours, then a 12 hour cool down.
JackCrafty Thank you very much, this helps quite a bit. According to what your saying I was overheating the stone a lot, which of course caused all sorts of stress fractures and heat pops. Thank you
@@benjaminbendele4488 you're welcome. If you still get heat cracks at 325 degrees, then either the stone is better worked raw, or you should go down to 300 degrees or even a bit lower.
Jack can you get enough heat in your turkey roaster to cook Keokuk Burlington? How much heat is saved by insulating the lid like that? Thanks for doing your videos, I get a lot out of them. Kenny
I would try it anyway. It probably won't get hot enough but there's a chance it might work at 500 degrees. It won't damage the stone in any case. The stone can always be heated to a hotter temperature later.
erm... "rock wool" is asbestos. Sure you want to use that in any capacity? Even true fiber glass isn't true glass and is likely to contain asbestos. Yeah, cellulose fiber et al can't be used but have a care with those other two.
as I understand it: 200 ° Celsius for 24 hours, then leave to cool dawn for 4 hours at room temperature , right? my English is very limited ... thanks for the video and all!!
+Gianbattista Giavarini We don't use Celsius here for the turkey roasters. The Temperature is 90 ° Celsius for 24 hours. Then 200 ° Celsius for 4 hours, then turn off the heat and open the oven after 12 hours of waiting.
I'm sure the Indians did it in a very simple and efficient way. I'm going to be experimenting with natural techniques soon. I'll let everyone know what I find.
Thank you for taking the time to thoroughly explain this process. Your videos are always very detailed and clear.
You're very welcome
the "buffer" material also acts as an insulator for the stone so that you do not need to insulate the lid. I did small scale heat treating in a slow cooker with decent success but I never added anything to insulate the lid since I used fine grained sand as a buffer material.
The cooling down period is very obvious to welders, ceramicists, and glass blowers. No need to explain why. I am of the former and latter. Cast metal welding requires a long insulated cool down. Why? It will crack and undo all your hard work. Simple. Thanks Pat.
Ah, so you were the one that taught me to cook rock haha couldn't remember where I watched it.
You can put your weed in it🥸
I have a question can you heat treat and nap limestone or have you ever tried 16:41
@@JessieGriffey-bo3yx I've asked that before, I personally haven't tried. I believe the response was "yes you can but the limestone has to be of good quality and it takes a really high temperature. To temper"
Thanks for replying always have here in Saltville Virginia my whole lot of limestone and sandstone thanks thanks for a drink thanks a lot but Bud I sure appreciate it
I know this is an ancient video, but its about Turkey roasters. I bought some " Primo Texas Flint" online. I thought it was spalls, like the pics showed. It is one batch of reddish river roxk(round) about 3"-4". Another batch of shiny grey, blue rock. It is hard as granite! I thought I could heat treat it. If I have to put whole pieces in turkey roaster what can you tell me to help!
The shit is absolutely worthless for knapping as is, unlike description online which said " flint knapping"!
Con artists!!
I just ordered two boxes of "primo" rocks from Ebay. I'll be doing a video on heat treating them when they arrive in about a week. In the meantime, I will be doing a deep dive into heat treating on other batches this coming week. I have a lot of experience turning crap stone into nice stone using heat treating. You can heat entire nodules if you want. The lighter colors work best. Don't go over 400°F unless the stuff is absolute concrete. In that case, you can go up to 500°F. The darker colors have a bad habit of breaking apart if you go over 325°F.
I used to dig pits to heat treat my stone til I watched this video, I have a 500 and 400
Nice
I've learned alot watching your videos and I'm a far better knapper now and I'm not destroying my hands and wrist ,every so often I make abo pieces to demonstrate for a youngster and I show the the direct percussion technique that I learned from you .,I work with them for a weekend and let them know they can come here anytime. I'm 54 and I enjoy teaching young people
@@draven3838 fantastic
Good information jack
this Thanksgiving I heat treated my rock by stuffing the turkey was Flint
Shweeet!
I forgot to put the drop cloth on it.
It was 4am when I turned it to zero.
I put one on when I woke up.
Hope I didn't mess my rocks up.
It's cooling as I type. It's 12:20 and it's still warm. I guess I'll see.
Thanks for your instructions Patrick.
No big deal. The dropcloth over the top is mainly to prevent drafts or breezes from changing the air temp too fast. It's not a problem if the roaster is inside and there's no fan in the room.
I'm finally cooking myself, good thing cause I was starting to drowned in rock. After watching many videos one of the things everyone seems to forget is the impact of ambient temperature. Your drop cloth idea addresses this. I'm sure it matters where you use the roaster. Right now the shed I'm using will be 120 all day, (Texas) not the same experience in Dakotas or Idaho. I would imagine a cool concrete floor or a shady breezy cool spot would always fight you trying to cool off gradually.
@@BrianJonah88 true
Watched another knapper a few yrs ago cook with sand, yadda, yadda. You rock with this vid. When I get cranked back up again(after march Silver Springs knap-in), I will buy raw and cook my own. I will check online for temps b4 I buy and that will be my guide. I bought a turkey roaster after that vid yrs ago and never used it. My daughter has it for Thanksgiving turkey. Lots of thrift stores so I will get another(or 2)(1 for backup). Thanks for the vid. It's gonna be a great help. Hope you get a notification on this message because I wanted you to know that you just saved me some money. :)
Cool. Glad you saved some money. Heat treating has really reduced the cost and frustration level in my own knapping.
Can I use my oven? I dont ser any vidros on heat treating in convetional oven..maybe a dumb question.
Yes, you can use your kitchen oven. Not a dumb question. The only problem you might encounter is a strange smell coming off the rocks as they are being heated. The smell is usually earthy or petroleum-like.
Excellent video my friend! Good news for me! My wife gave me the go ahead to use her older turkey roaster. (500°) During this process do you ever take the lid off to check on the rocks being cooked? Thanks again for sharing your knowledge on flintknapping. Take care my friend......
+Hush Hushfootusmc NO! I never remove the lid before the 12 hours is up. But I think you knew that and are just testing me.... heheh
Great video, I have two turkey roasters...
Want to heat treat some Ohio flintridge and Montana Moss agate...
Those stones will probably require more heat than a turkey roster can provide. Montana Agate might need up to 500F and Ohio Flint Ridge might need up to 675F.
www.pugetsoundknappers.com/how_to/Heat%20Treating%20Guide%20with%20Table.html
good video....will definately come in handy...as i progress
What does heat treating rocks do?
It makes the rocks become more like glass. The rocks chip more easily.
great video crafty, thanks for the time you put into these. This saves a lot of trial and error. will heat treating further help stone that is claimed to be already treated?
No it will become britle.
I just bought my roaster today. My question is can I cook flint with the cortex on.......the material I have been harvesting is fist size the size of potatoes. Should I slab it first then cook or grind off the cortex. I have learned all I know from your videos and trial and error. Thanks Jack!!!!
It cooks fine with the cortex on. Slab it first, if you can, before heating.
Appreciate the video. I picked up one today. A GE brand that goes to 450. Got it through Facebook Marketplace for only $5!
It''s deep too. About 5.5 inches from the bottom to the bottom of the lid.
Good info have my first batch in right now. I found a roaster that goes up to 500 at an estate sale the other day, CHEAP. Thanks for all your videos and info.
500 degrees, that's awesome.
+JackCrafty Quick question. I have heard of people using thick Styrofoam insulation around the cooker. Not tight fit but about 3" or so all the way around. Some used the type with a reflective backing putting the reflective side in. Will this help keep the heat in and or not? I know you can use it when making a bow heating bow.
Mr. Crafty, thank you for the advice on the root beer material, I’ve recently acquired some Pedernales amoeba, and I was wondering if/how should I heat treat it?
Start with low heat ( 300 degrees F) and if it doesn't seem easy enough to chip ( after you let it cool for 12 hours), you can heat it again at 325 degrees F, and so on, with a rise of 25 degrees for each attempt. It doesn't matter how many times a stone is heated and cooled.
Thank you again
Why not just use an oven?
Thanks for this video. When I put the stone into the roaster to dry for 24 hours on 200, can I put the entire round cobble in with intact cortex, or do I need to try to spall out the stone then heat treat? I'm finding some sweet looking chert 10 minutes from my house, but it is either pieces that have already sheared off the parent boulder or cobble, or it is an entire cobble with intact chalky cortex. The largest material I'm finding that I can get without having to dig/extricate is about the size of a vollyball and roughly the same dimensions...ie round. I don't want to screw it up by blasting away on it raw and getting a bunch of steppy screwed up fragments, so I'd rather heat treat the whole shebang before hitting it at all, but I all the vids I see, folks are sticking spalls into the cooker...not whole rocks with cortex intact. I just dont want to do something that is going to cause damage my basement/family. Thanks, Eric
You can heat entire cobbles with cortex and everything but you will need to heat it very slowly and cool it very slowly. You can try starting at 200F and then ramp up the heat by 10F every hour until you reach 350F and let it cook for 24 hours and then cool it down by 10F per hour. See if that works. If not, you'll need to spall it. Volleyball size cobbles are really risky.
Cool! I’ll give it a try with a couple of the big rocks, as it looks like I’ve been blessed with a gracious plenty knappable rock just up the road! If they do something funky, I’ll figure out how to spall the rest.
I have no clue as to the specific type of chert I’m finding. From outside in not including the cortex, most is grey then black, some is solid grey, some is solid black, some is black with light specks evenly throughout, and some is tan/beige. The solid grey is more grainy than the other rocks that seem to be very smooth and glossy. Is there any particular quality of a stone that indicates to you that it needs to be heated at higher temps or for longer periods of time given you don’t know exactly what it is?
Thanks again for sharing your wisdom, and I won’t bug you on this subject beyond this!
@@ssrhythm6923 A good rule is the grainier and duller the stone, the more heat it needs. Obviously, the shinier it is, chances are it will work well without heat.
@@KnapperJackCrafty that makes perfect sense...thank you.
Is there anything left to make gravy?
Nope. No drippings.
I just stumbled upon your videos, and I'm loving them so far. For your insulation on your lid, have you ever looked in to Kaowool or ceramic blanket along with Rigidizer? They're used for lining foundries and can withstand up to 2000-3000 degrees F. I I think that would work very good for what you do and would contain the temp the entire time and not let heat escape.
Now, as far as testing the rock to feel for it "being right," what type of feel are you going for? Is it supposed to feel soft, or able to chip away little layers by hand, etc.
I wouldn't mind getting in to this. Seems like a great hobby. What do you do with your points? Is it something just for collecting, or do you attempt to sell them, etc. Is everything experimental, or are you well informed of how various native americans used their stone tools. What they used each tool for, etc. I'm not sure if you discuss these things in other vids, but I'll keep watching!
Hello Rodney. I've never tried the insulation you mentioned but it sounds like it will work fine.
The "feel" pertains the how easy it will chip. The easier the better.
I make arrowheads because I want to understand what the capabilities of our ancestors were and how our brains developed. I also make arrowheads because it is a satisfying hobby. I don't sell very many but I could. I mostly give them away.
I have some knowledge of ancient stone tools and I read a lot or archaeological studies but I have learned most of what I know by actually making the arrowheads and trying to find various ways of achieving the same results as the ancient knappers.
@@KnapperJackCrafty Well you sir, have inspired me to get into this hobby.
Awesome! Thank you
Do you have a video on the difference between Knapping raw stone verses heat treated stone?
Good question. Actually, I don't. But here's a good rule: your tools will attack heated treated stone and you will most likely win. Raw stone will attack your tools and you will most likely lose.
Hello Jack hey I was wondering what did the Natives or early man use what some guys called blunt tip arrowheads
Blunts are usually considered to be knives or scrapers. They don't have impact fractures, as far as I know
Does heating the stone make it easier to work ?
Yes. A lot easier.
Jack have you done a series on how to handle turtle backs with indirect percussion?
I try to include the removal of turtle backs in almost all my videos. I wish I had a list of videos and the specific time stamps for each turtle back removal but I don't have enough time for that. :-)
another fantastically informative video! im currently looking for a turkey roaster... i've heard the older ones are the way to go. more reliable and consistent temps from what i hear. do you know anything about that or should i stop waiting to find an old one, and just buy a new one? i cant wait to feel the difference of heat treated stone.
just go out and buy one. it will last longer than a used one and probably perform better. I had lots of trouble with the temperature dial on my last used one.
That settles it then! I'm getting a new Turkey roaster! Thanks for helping me pick a side of the fence!
+Daniel Cooper cool. :-)
+JackCrafty quick question before my first batch. that painters cloth you cover the roaster with... do you only use that in the cool down stage or throughout the entire process?
+Daniel Cooper Just in the cool down stage.
I finally found a cheap used turkey toaster that works at a thrift store so I’m gonna start experimenting with heat treating now. Also I have some spalled chert that’s peen sitting in my backyard for a few months in the intense Texas heat should I dry that stuff out for the whole 24 hours or should I just gradually bring the temperature up to 400?
Definitely dry it out, just to be safe. With small flakes it doesn't matter but with spalls and nodules there's more of a chance of trapped water.
Great video. Question,,,,can you cook smaller flakes? Most rocks I’ve seen cooked are bigger and I haven’t seen a lot of smaller flakes. If you can cook smaller flakes would the time be shorter since they are smaller?
Small flakes are cooked exactly like large flakes. Same amount of time no matter what the size.
JackCrafty awesome! Thanks for the response.
Would perlite be an option?
Yes.
Does the size matter? I have a big stone and I'm wondering if I should break it into smaller pieces or cook it as it is.
Smaller is much better. Large stones do not heat evenly.
@@KnapperJackCrafty alright, thanks.
Hi, Patrick what kind on pen do you use to write your name on the arrowheads.
probably a Micron Pen - look at art stores - soe people like to use a clear glue or nail polish and apply a small space on the rock with it. once it dries you can use your fine tip pen/marker to write on the dried nail polish. you can remove both of these with 90% alcohol, so it is a reversible process.
I'm gonna get one and try it out. I have a good amount of stone that has slick brown cortex and light grey color inside. Very grainy but I'm hoping it will Cook. It's from central TX . Do you know what that stone is called?
Probably "bull gravel". It's a chert that is common to the western edge of the Edwards Plateau.
It should heat just fine, but spall it into flakes first or it may blow up. Some will blow up anyway, no matter what you do, because this is not just one variety of chert (all the nodules with the slick brown cortex will be different inside) and it can be very unpredictable.
see my latest video for advice on starting the heat at 275F: th-cam.com/video/o85YNzcYr68/w-d-xo.html
@@KnapperJackCrafty Thank you so much I was at the local DQ today and noticed they had a rock bed that looked like it had some stone in it that looked the same. I'll check out the video. Appreciate it.
@@backyardbuck6362 yes, bull gravel is used at many businesses for landscaping rock.
Please disregard my message. i just found the this vid again. The wifey is letting me use her turkey roaster to treat those flint ridge rocks.
+HillbillysNdaBush Nice! Flint ridge is awesome material. I assume you got the recipe for it? I'm not sure but I think flint ridge needs a lot of heat....
I am watching Roy Millers vid on treating it now. He says 400 to 600 depending on the grade.
How did the rock turn out? Flintridge is some of the hardest rock I have ever hit. But man is it pretty. I have only ever quarried it once and was dead after. My body has never hurt so much. I will only ever buy it again. It was just too much work for me. But I likely did not have the right tools.
I have a number of rocks from north Arkansas, but I don't know if I can use them to heat, does it matter what kind they are?
Yes, it does matter what type they are but just try heating them and see how they knap. If you don't have very many stones and you don't want to waste them, knock of a flake from each stone and heat treat the flakes to see if they respond to the heat.
have you ever done any experimenting with enhanced color?
can you use an oven
Yes, you can use an oven but sometimes there will be unpleasant or strange odors coming from the rock as it's heated. I doubt that there will be toxic fumes, but I'm not an expert on the subject.
Ok thanks
sounds good..are whole chert nodules okay to cook or would spalls be better...i got a couple softball size nodules...i would like to cook whole before tring to get at them....
Nodules are OK if they are potato sized or smaller. Not the giant potatoes, the medium sized ones.
Aint found any bigger than a baseball or softball size yet being a new guy just learning to identify chert or chert sources...looking in deep road cuts and rock creek beds..in missouri..got one nodule from a rock shop..rest found
I have a question on the suggested temperature to heat treat Texas root beer flint at. Could you give your input on this stone?
Texas rootbeer usually does well with low heat: preheat/dry at 250 degrees F for at least 24 hours, then 325 degrees F for 3 to 4 hours, then a 12 hour cool down.
JackCrafty
Thank you very much, this helps quite a bit. According to what your saying I was overheating the stone a lot, which of course caused all sorts of stress fractures and heat pops. Thank you
@@benjaminbendele4488 you're welcome. If you still get heat cracks at 325 degrees, then either the stone is better worked raw, or you should go down to 300 degrees or even a bit lower.
Jack can you get enough heat in your turkey roaster to cook Keokuk Burlington? How much heat is saved by insulating the lid like that? Thanks for doing your videos, I get a lot out of them. Kenny
I would try it anyway. It probably won't get hot enough but there's a chance it might work at 500 degrees. It won't damage the stone in any case. The stone can always be heated to a hotter temperature later.
erm... "rock wool" is asbestos. Sure you want to use that in any capacity? Even true fiber glass isn't true glass and is likely to contain asbestos. Yeah, cellulose fiber et al can't be used but have a care with those other two.
According to the EPA, the use of asbestos in new products (including building products) has been banned from the marketplace since 1989.
@@KnapperJackCrafty True. Just saying that if one is using old stuff, to be careful.
@@slhughes1267 cool.
Nice video!
+Fabrizio Semprini Thanks!
as I understand it: 200 ° Celsius for 24 hours, then leave to cool dawn for 4 hours at room temperature , right? my English is very limited ... thanks for the video and all!!
+Gianbattista Giavarini We don't use Celsius here for the turkey roasters. The Temperature is 90 ° Celsius for 24 hours. Then 200 ° Celsius for 4 hours, then turn off the heat and open the oven after 12 hours of waiting.
+JackCrafty thanks so much. I wish you and your family a Merry Christmas and a new year full of health and happiness. ciao
+Gianbattista Giavarini Thank you and Merry Christmas to you too!
Gianbattista, fai ancora la scheggiatura?
yes, I try to learn the technical control. flint I have available is not very good but is good for small blades. hello, Gianbattista
For people coming to this who can't find a turkey roaster that will get to a high temp, I found this: th-cam.com/video/lMi1P-J-nmY/w-d-xo.html
Thanks. Now I know enough to give it a try. Makes me wonder how the Indians did it. You explained things well!
I'm sure the Indians did it in a very simple and efficient way. I'm going to be experimenting with natural techniques soon. I'll let everyone know what I find.
Kaowool
5 minute video that ran for 20 minutes. Good info in video but to much rambling and other nonsense. Made it very hard to watch.
Looks like someone doesn't know how to speed up videos...oops.
JackCrafty best reply ever!! Didn’t really think the people into this kinda hobby were the impatient type.
What about edwards plateau stuff thats not nappable? I know some is but some ain't and its really grainy does that need 500?
Yes, probably. I would try 400°F first, though.
@@KnapperJackCrafty that's i just ordered my roaster can't wait for nit to come help save money don't this way
@@CrozzBallz 😊👍