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How magnetic tape is made
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- เผยแพร่เมื่อ 8 เม.ย. 2020
- National Audio Company president Steve Stepp guides viewers through the production of magnetic tape. Note that this is just one way of making tape; in metal evaporate tape, the magnetic material (Iron Oxide (Type I), Chromium with Cobalt (Type II), Metal particles (Type IV, or in this case, metal layer since applying particles in a vacuum chamber is impossible) is applied in a vacuum chamber. This process is used for Type I, II, IV, (cassette tape) metal particulate (LTO tape)/particle (DV tape) and BaFe (LTO) tape. Type IV and metal particulate/particle are similar.
from www.news-leader.com/story/new...
I'm A Musician and Audio Compact Cassette Tapes are my Number One Format For Music. Especially After I Proved That I Record Tapes LOUDER SHARPER CLEANER Than CD's and Especially MP3's! I would definitely Love to work in this factory, to continue Cassette Tapes production. I demonstrated to numberous of people how my tapes sound LOUDER than CD'S. I have over 4,000 Cassette Tapes in my collection since 1993 till Now and it keeps growing. I know how to take any tape transport apart, fix the problem, and put it back together, same with cassette tapes, I fix anything related to magnetic tapes. I'm recording everything to Compact Cassette Tapes till this day. I'm 36 and I want to continue the tape culture
I invented a way to make your own fine iron oxide: 1) electrolyze salt water with scrap steel electrodes and 5 Volts until it gets too thick. 2) boil off and roast in a pan 3) redissolve and pick up the oxide out of the water into fresh water with a magnet inside a corner of a plastic bag, you take the magnet out, the oxide falls off the bag 4) pan, boil off, roast again. Its very fine, magnetic, and makes a great natural brown pigment. I have a whole jar with it and every time I approach a magnet, it creates otherworldly alien looking sculptures like from another planet.
thank you for this information, i'll try this one out one day :)
ALWAYS wanted to see this! Hope NAC keeps refining their process & formulations 👍👍
I remember, when I was a senior in highschool back in 2002 and reading a newspaper that major companies will stop releasing audio tape by end of October. That's when I took tapes even more serious. Tho, in my country, they were still releasing music on tape till 2013. I went to different stores bought Blank TDK, Sony, Maxell and Radio Shack Blank tapes. And purchased as many as I could to continue to record on tape. ( TDK stoped selling Blanks in 2013, Sony Discontinued Blank Tape Sales in 2018, Maxell, However Still Sells Blanks, Just Bought some More Blanks From Maxell at Fred Meyer. I Don't Even Remember When Radio Shack Stoped Selling Theirs, But Either way, Their Tapes Were made By Maxell, Which Are Still sold today. ICE Information-Communication-Entertainment Company Still Releases Blank Tapes Today In Various Colours. Bottom Line Is, As Long As I'm Alive, I'll Keep Using and Releasing Music On Audio Compact Cassette Tapes, The Way It Should Be!
Tape will never die, i still buy my music on cassette
I have a feeling that VHS tape and floppy diskette could be viable business in the future too. Bet there's some arcane industry which still needs them. Also nobody supplies Type II audio, which is pretty versatile, would be nice.
We need to bring back the legenadry cassette one more time
for once and for all.
Iron is Magnetic. However to Make Tapes You Have to Add Silver (Chrome). For CD's, DVD's and Blu Rays (Gold/platinum) You Have To Add a Lot.
Love CASSETTE TAPES COMING BACK AGAIN!❤️❤️
I'M 18 AND I STILL USE CASSETTE TAPE TO LISTEN TO AUDIO ❤️😊😊❤️❤️😊😊❤️
So, what’s in the slurry? I have a flurry of slurry questions in a hurry.
I'm guessing iron oxide dispersed in some solvent to make it a slurry
Pancho507 Whilst iron oxide was a popular ingredient, I know of other magnetic ingredients also used and of course, there were the binding agents, anti-fungals etc. If only it were a simple recipe!
Now with that first point out of the way, maybe we can learn from old patents.
Materials used in the slurry would vary on the type of oxides (hico/loco) and solvents (thf/mek) used in the formula. Some of the common materials used may include a specific range of polyurethanes balanced to be ran (coated) at specific viscosity to allow for magnetic orientation and locking in the particles after leaving the coating magnet to optimize magnetic performance. With the use of the calendar on this pilot coater, I suspect that little or no catalyst (hardener) is used in the slurry.
I've Figured it Out - Make the Head more Sensitive, then Add Less Chrome. Like How the CCD Camera Sensor's Transistors are Made More Sensitive.
Always great to see you so passionate and in good health Steve
This is Majed
Any consideration of making 1/4” pancakes
Would love to have some of your new process used for the most recent cassettes
Be well
Bets on the odds of type II ever being made again?
Just about none. The environmental impact of manufacturing type ii was too great and modern regulations wouldn’t allow it to happen using the known methods. If they were to figure out a stable, environmentally friendly formula that would be a game changer. But I wouldn’t hold your breath. Just R&D for that would probably be astronomical. What I think we CAN hope for would be a true “superferric”. IMHO these sound better, even more natural than type IV, and you can make them using type i equipment. Who will do it first? Not sure, but bc of the inability to make type ii, someone’s got to be on the case!
@@BogoEN well we do have new old stock chrome tape. (Also cobalt doped, same thing.) The newest chrome tape is justin beiber's purpose album on cassette.
@@UrOpinionsSucc That’s interesting! I do know that China is producing non-branded type II tapes, I bought a few from my tape supplier in Brooklyn a couple of years ago. And yeah, NOS tapes are the way to go, shame that they cost so much now bc of demand. I remember debating buying some in 2017 that were more than $2 a pop 😂
ATR and TASCAM are making type ii tape cassettes. Check them out in USA
I Wish I Can Work In This Factory, To Continue Tape Production
Great stuff guys I want to see cassettes in stores
Removing the plastic wrap from a 2021 made virgin audio cassette to make your favorite mix tape, just as we did as kids in the 90's. How awesome would that be!!
@@hugoromeyn4582 I still buy new old stock tdks and maxells its the best feeling!
@@hifi.david. Maxell XL II?
@@hugoromeyn4582 Yeah anything thats type 2
I just wish it were more detailed.
How is the polyester film made?
Fascinating! Thanks for sharing. I'd be interested in knowing which magnetic media formats they do produce. Floppy disks, maybe?
They make tape for cassette tapes
I wouldn’t be surprised to learn that the early floppy disk media probably started out as a wide roll of tape Brian. I’ll go and look around for us all and report back.
@@Jenny_Digital My thoughts too. I do know that those "Disc" 15-frame camera film cartridges were made from roll-ends from stock used for 35mm etc.. Don't know if you've seen those .. will have to dig them out.
Perhaps this was (and could still be) done with magnetic tape too as I'd guess it does come from wide rolls subsequently cut to width. I'll have to rewatch this and likewise see what I can find.
It would certainly be harder to produce consistent results putting the coatings on pre-cut narrow tape ...
😍
I've been wanting to understand how these work, like how do the magnetic fields imprint information on the tape? For example, in CDs the disc reader scans the disc looking for bumps and sections without them and that reading is later transferred into code. How does that happen with the tape? If anyone would be interested in answering my questions and/or correcting my statements, it would be very much appreciated.
The particles on the tape get magnetised, and so produce a magnetic field. When the tape passes the read head, the moving magnetic field induces an electric current in the coil in the head, producing a tiny electrical spike. A sequence of such spikes produces a waveform in the read head, which is then amplified and fed to a speaker to produce sound.
Check out the video by macProVideoDotCom called "Audio Concepts 107: Analog Tape Recording - 3. Physics of Tape"
when was it recorded?
I just find it funny that old technology like the record come back when almost al people have thrown it away, wich I think will happen to the cassette too.
Interesting video on making mag tape - an art that is being lost for sure. Please let me know if you have any questions or concerns related to the coating process or slurry compounding. Your 6" pilot coater line seems to be able to do the job well for you. I'm guessing your using horizontal mills for the oxide compounding/processing and precision feed gearpumps to feed your slot die reverse roller coating head.
Metal tape?
I think that the return of cassete tech is more because strategic reasons more than retro nostalgia. Magnetic tape can be made with a microfilm plastic (Even Celophane!) and crushed magnetite, all renewable, readily avaible and cheap materials.
Such magnetic tape can't achieve a high storage density. It's why LTO magnetic tapes use exotic materials such as PEN plastic film and Barium Ferrite magnetic material to store terabytes of data in a single cassette.