Ganoderma Posted July 12, 2006 Report Posted July 12, 2006 I am looking for jars and at one of teh stores here i noticed some used different seals. this got me thinking ( i am no chem whiz) bout the various sovents used in the jars and what they may do to the seals. I am curious about mainly the formalin and plastic. what about the common red rubber type seals, are they ok? i assume most stuff is safe with alcohol seen as they are stored in plastic. Quote
Mercedes Benzene Posted July 13, 2006 Report Posted July 13, 2006 Ummm... I can help you with the chemistry part of this "problem", but I am not exactly sure what you are asking?What do you want to know about these jars?:) Quote
Ganoderma Posted July 13, 2006 Author Report Posted July 13, 2006 oh sorry. i was wonderin if any of teh more common fixatives/preservatives will degrade teh rubber/plastic seals in jars. i have not doen much preserving so i dont know if there are sepcial materials made for this purpose. will formalin or alcohol (ethyl or iso) harm the seals? thanks :) Quote
Mercedes Benzene Posted July 13, 2006 Report Posted July 13, 2006 Well... unfortunately, I could not tell you unless I knew what the rubber was made of. You see, there are many possible types of "rubber" that could be used in a jar seal. Let me do some research and get back to you. And, if you can, try to find out what the seals are made of. -MB Quote
Ganoderma Posted July 13, 2006 Author Report Posted July 13, 2006 ok thanks. i am not 100% certain what these are but i think they are likely Polyurethane or Neoprene. here is a website. are any of these products unsafe? if there is one that you think would stand teh test of time i will order them. Or perhaps replacing is needed? i was planning on preserving with ethyl and replacing that very 5 years or so anyway. Nitrile, EPDM, Natural, SBR, Viton, Butyl, Neoprene, Silicone, Polyurethane. http://www.honeycrown.co.uk/rubber-canning-jar-rings.htm i am aslo considering expeimenting with propylene glycol. the very few things i have read seem promising. any comments on that? *here is a link if you are interested at all. although i am not keeping my sepcimens cold at all....http://www.bio.sdsu.edu/pub/spiders/HedFiles/vinketal2005.pdf Quote
Mercedes Benzene Posted July 13, 2006 Report Posted July 13, 2006 Okay. Here's what I've determined!Good luck, and tell me if you need any more information. EPDM: Ethyl Alcohol = okay, Formalin = okayNeoprene: Ethyl Alcohol = okay, Formalin = not okaySilicone: Ethyl Alcohol = not okay, Formalin = not okayNitrile: Ethyl Alcohol = not okay, Formalin = not okayViton: Ethyl Alcohol = okay, Formalin = not okay These are the only seal materials (from their website) that I could find data for. It looks like EPDM is your best choice, unless you can get more information. I will continue to look for you!Check the packaging, or ask the manufacturer the exact composition of the seals before you buy the jars. Good Luck! InfiniteNow and pgrmdave 2 Quote
Ganoderma Posted July 14, 2006 Author Report Posted July 14, 2006 excellent thanks so much! greatly appreciated :naughty: Quote
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