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I have very stubborn matrices from Kiowa Formation that I am trying to break down to look for micro-fossils and fossil teeth. I have tried vinegar baths and ultrasonic cleaner to break it down quicker but it's not helping much. Anyway, I am trying the freezing and thawing cycles this time to further break it down. For the last few days, I had it soaked in water for about 24 hours and then I put it into the freezer bag to freeze it, and then thawed it out after overnight. Before freezing, should I add extra water into the bag or are the matrices being damp good enough? Are there more efficient ways to use the freezing and thawing cycle method? Thank you.
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- freezing
- kiowa formation
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Can anyone tell me whether this kind of glue (B-72) will hold up under freezing temperatures? I had the idea to prep out one of my local shale fossils using the freeze-thaw method, but I have glue in the part of the fossil that I want to keep intact. I don't want to subject it to freezing temps if the glue won't hold up. The plan is not to soak the whole piece, just apply a bit of water on the (unglued) side I want to freeze, either outside this winter when it goes below freezing, or in the freezer.
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- b-72
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