am so glad, this video is very impressive please do you mind making a video on Raman spectroscopy and why its used on identification of microbial interation with geologic substrates?
Thanks so much for sharing. Would love to know how you keep your grooved laps flat over time? And also what type of UV glue do you use to mount the sample onto the glass? After vacuuming out the bubbles from the resin in a chamber, placing the samples into a pressure chamber (like a seal-able pressure paint pot) over night at 55psi would further reduce air bubbles. Again, thanks so much for sharing.
You can get the lap machined flat again by a machine shop - they're not sophisticated. While you're at it, you might want to take some time to actually level the lapping machine - not everybody does. Being off-level helps to smoothly shuffle the slides around on the lap if you're mass-producing. Across a thin section, you'd struggle to measure even several degrees of "cone" from uneven wear. Simply changing from grinding on the edges to grinding on the lap centre routinely was all the technicians at college advised us to do. You *can* pressure-flood resin into rocks, if they've got a high porosity and permeability, but generally the finer parts of the pore network are insignificant in terms of reservoir properties. It's a charged-for extra, probably after you've had the first batch of sections cut from your core.
The glue's important point is to have a refractive index that matches "Canada Balsam", which was used in the development of petrography. There are several commercial products that match this specification, and things like setting time, UV sensitivity dictate which one you'd use for a particular job. Air bubbles aren't that much of a problem, even without the depressurisation step (see "setting time", above).
What information do you think you'd get from cutting a section (see prices above/ upthread), which you wouldn't get from doing a detailed description of the hand specimen. Do you have any reason why you think it's a meteorite sample?
The last time I looked (20-odd years ago), the prices for single specimens were in the £30~£50 range. Per section. Commercial labs want large orders, not single samples.
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The quartz sand addition is genius, thanks for sharing!
A vacuum does not pull the resin in to the voids. It removes gases allowing resin to flow in. Reintroducing some pressure assists this.
am so glad, this video is very impressive
please do you mind making a video on Raman spectroscopy and why its used on identification of microbial interation with geologic substrates?
Many thanks for this enlightening tour
Thanks so much for sharing. Would love to know how you keep your grooved laps flat over time? And also what type of UV glue do you use to mount the sample onto the glass?
After vacuuming out the bubbles from the resin in a chamber, placing the samples into a pressure chamber (like a seal-able pressure paint pot) over night at 55psi would further reduce air bubbles. Again, thanks so much for sharing.
You can get the lap machined flat again by a machine shop - they're not sophisticated. While you're at it, you might want to take some time to actually level the lapping machine - not everybody does. Being off-level helps to smoothly shuffle the slides around on the lap if you're mass-producing.
Across a thin section, you'd struggle to measure even several degrees of "cone" from uneven wear. Simply changing from grinding on the edges to grinding on the lap centre routinely was all the technicians at college advised us to do.
You *can* pressure-flood resin into rocks, if they've got a high porosity and permeability, but generally the finer parts of the pore network are insignificant in terms of reservoir properties. It's a charged-for extra, probably after you've had the first batch of sections cut from your core.
The glue's important point is to have a refractive index that matches "Canada Balsam", which was used in the development of petrography. There are several commercial products that match this specification, and things like setting time, UV sensitivity dictate which one you'd use for a particular job.
Air bubbles aren't that much of a problem, even without the depressurisation step (see "setting time", above).
I love it (thin section). Nice job.
Hi are you have any job of thin section making?
Hi, I'm from Vietnam, can I test my meteorite sample? Thanks
What information do you think you'd get from cutting a section (see prices above/ upthread), which you wouldn't get from doing a detailed description of the hand specimen.
Do you have any reason why you think it's a meteorite sample?
What type of molds are those?
These are a peel-away molds from Polyscience INC.
Cheap, disposable.
I'd look into the food industry for something suitable. You might have to get a year or so worth made to-order at a time.
What is the cost for preparation of single standard thin section
The last time I looked (20-odd years ago), the prices for single specimens were in the £30~£50 range. Per section.
Commercial labs want large orders, not single samples.
Any job of thin section making.
Around one job per million other people. Maybe two, including other multi-duty university technicians.