missspider
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posted on November 4, 2000 10:23:28 PM
Hi all you wise people...I had an email from an ebay user tonight stating that an item I have up for auction is casein, not bakelite. I assumed (I know...I know) that because it looks and feels like the dozens of bakelite bracelets I have, that it was actually bakelite. I certainly do NOT want to be misleading! Does anyone know anything about casein? Or can you point me in the way of finding out? Thanks in advance!!
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barkrock
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posted on November 4, 2000 10:33:44 PM
Like Bakelite, Casein was a forerunner of modern plastics. It was made of milk protein. According to the jewelry book in my lap, it was hard to mold and therefore was usually carved; it will slowly absorb water, and "crizzles" in humid weather.
Hope that helps somewhat!
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abacaxi
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posted on November 5, 2000 02:27:43 AM
Casein is a milk protein, and was used in some early plastics (makes a neat science project for kids ... ). It is odor free and fairly light weight compared to bakelite
Bakelite is made with formaldehyde, and was pressed into shapes under extremely hight pressure, hense its density. If you get it warm, it stinks of formaldehyude - depending on your nose sensitivity, you can rub it with your thumb until it's warm, or dip it into HOT water then sniff.
There is also Catalin - also smells of formaldehyde.
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HartCottageQuilts
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posted on November 5, 2000 07:25:27 AM
Now there's an appealing technical term I'd like to throw into lulls in conversation: "crizzle".
Except I'll need to know what, exactly, that is.
Can you please define?
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dman3
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posted on November 5, 2000 07:41:22 AM
"crizzle"
Seems clear to me what as I use this word.
He "crizzled" his nose at me and it just cumbled off like stale bread .
hmmm !!!
WWW.dman-n-company.com
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toke
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posted on November 5, 2000 08:00:38 AM
Given that you have to make various tests to define the type of plastic with any certainty, I'd sure like to know how this emailer determines your bracelet is casein from a picture. Doesn't sound credible.
Why not just add that you guarantee your bracelet to be of at least *** age, and made of some form of early plastic?
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toke
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posted on November 5, 2000 08:06:09 AM
Here's a site on testing plastics:
http://www.plasticfantastic.com/testing.html
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missspider
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posted on November 5, 2000 10:57:23 AM
Thanks to all of you. I agree it's very difficult to determine exactly which old plastic an item is. I amended the item description to include that it could "Possibly be casein". Thanks TOKE for the link to a great site, lots of useful info there. And thanks to all of you for replying!
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TheFed
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posted on November 5, 2000 02:30:46 PM
Hi All! How is Casein pronounced? Phonetically does it sound like: Casey-in or Case-In or something else. Thanks for your time.
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dman3
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posted on November 5, 2000 04:47:25 PM
I believe its pronounced K-sein
WWW.dman-n-company.com
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HartCottageQuilts
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posted on November 6, 2000 03:55:40 AM
It's prounced kay-SEEN.
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missspider
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posted on November 6, 2000 07:01:27 AM
Hmmmmm, funny hahahaha, the auction has closed and guess what, the emailer was the high bidder.
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toke
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posted on November 6, 2000 07:21:34 AM
HA! Why am I not surprised? Their photo ID of casein was a bit of a clue, huh? 
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