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Showing results for tags 'chemical'.
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Questions about chemical preparation
gigantoraptor posted a topic in Fossil PreparationHello all, Me and my friend would like to start practicing chemical preparation. Neither of us have done that before. We were mainly wondering what types of commercially available fossils are fit to practice this on? I know of limestone fossils like Keichousaurus, but that seems quite expensive for a first try. Neither of us lives close enough to a fossil location to reallistically obtain this way. So I tried to make a list of items that are not too hard to find unprepared. My friend has quite a bit of experience with working with chemicals, but doesn't know what chemicals would wo
Crusty_Crab posted a topic in Fossil PreparationI am writing a short manual on preparation methods for our club and I am including a short section on chemical preparation. This is most commonly done with acids on carbonate rocks. For many newbies, chemical preparation is attractive since all you need is a weak acid that everyone has in their kitchen (vinegar or lemon juice) and don't have to buy expensive equipment. I try to avoid it if at all possible since it works on a very narrow class of matrices, you have relatively little control over it, you may dissolve the fossil itself if it hasn't been silicified and its irreversible. Consequent
Malone posted a topic in General Fossil DiscussionI was interested in the process of cementation bivalves use to attach. I used the internet to research and couldn't come up with much information. I don't know if I am using the right search terms or if there isn't that much information. I thought this was the best avenue to find the answers. Maybe @doushantuo could help but any help would be appreciated!
Fossil preparation through chemical treatment using potassium hydroxide.
Lmshoemaker posted a topic in Fossil PreparationPART 1. Greetings all, it has been quite a while since I've posted here. I recently purchased some potassium hydroxide (KOH) flakes from Amazon for fossil preparation purposes. I was told about this chemical as a substitute as Quaternary-O by my friend Gabe Ward. This stuff is basically a really strong base that works (I think) through oxidizing ogranic compounds in a rock. This makes it particularly effective on shales and siltstones, but not so much with most limestones, especially crystalline varieties. I wanted to write a post about this stuff because it seems like it has the potentia