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Feb 2, 2010. 8:25 PMiac
says:
During WW2 Italian Army uniforms were made from a synthetic fiber caled LANITOL, made from Casien (sp?) which is a milk protien. This must be similar
Apr 15, 2010. 4:48 AMmacrumpton
says:
Since at least the 15th century casein has been used as a emulsion (the adhesive substance to which the pigment is added) for creating artists tempera paint:
Artist casein paint
It is quite durable and keeps the colors very fresh. It was very common for farmers to make a milk and lime based house paint.
Milk house paint
And another based on curdled milk, borax and chalk:
Curdled milk paint
Artist casein paint
It is quite durable and keeps the colors very fresh. It was very common for farmers to make a milk and lime based house paint.
Milk house paint
And another based on curdled milk, borax and chalk:
Curdled milk paint
Aug 14, 2007. 9:22 AMRed_Icculus
says:
Isn't that just cheese curd? If you add a bit of fresh milk back to it, it would be cottage cheese.
Actually, it precipitates the casein (a protein) out of the milk by effect of the acid (vinegar) and heat. Acids denature and coagulate proteins. The plastic-like substance it created is very likely rather sticky. In fact, in bygone days, a reaction such as you describe was a common and a popular means to produce an early form of glue -- now supplanted by good old Elmer's carpenter glue which is very different in composition and far superior to casein glue.
Feb 15, 2010. 2:17 PMWesley666
says:
He is right though, this is Curds and Whey. I was thinking this will probably go bad after awhile, especially if it gets wet...
May 7, 2009. 10:08 AMtyettac7
says:
Since you have alot of info. i need to know why is it so brittle. Because if i'm going to present this at a Science Fair for Sciance i need to know how real plastic. so i can give some to my audience and they can say look this girl gave me some plastic. Please Help!!
Actually, I got most of it from here: http://www.newton.dep.anl.gov/askasci/chem00/chem00367.htm
But I'll look it up.
But I'll look it up.
Jul 19, 2009. 10:21 PMmr. grimme
says:
dude. thats milk and vinager. it will rot. vinigar speedsthe proccess. gross dude.
Feb 15, 2010. 2:15 PMWesley666
says:
Its still gonna rot though. This is showing you how to make Curds and Whey, not plastic. Plastic is a petroleum product and Milk is not. This "plastic" is a very edible substance (Curds, the solid portion) that are used to make cheese...
Feb 15, 2010. 2:13 PMWesley666
says:
I see problems with this. If you're just using Milk and Vinegar, then your not making plastic. Your actually making Curds, the solid part, and Whey, the liquid part. Your "Plastic" is actually very edible substance that is used to make cheese...I'm not sure, but your plastic may go bad/mold if you leave it for awhile, or gets wet...
This isn't plastic. Plastic is a petroleum product. Milk is not a petroleum product. This is not plastic, and will never be plastic...
This isn't plastic. Plastic is a petroleum product. Milk is not a petroleum product. This is not plastic, and will never be plastic...
Jan 19, 2010. 4:30 PMValos_Cor
says:
Huh, that's nice. I've never thought of curdling milk and using it it... actually, I've used lime instead...and, uh, drained it and ate it. It's pretty good. With vinegar? It would be disgusting. I didn't HEAT the milk though. Though, this is kind of like just "curdled milk", not very impressive "plastic" though.
May 7, 2009. 10:04 AMtyettac7
says:
I need to do this for a project and it need to give every single step. And also where You got this information from.
Mar 18, 2009. 1:57 AMwanie
says:
is this plastics are brittle? can i know how to make it insoluble with water?
Aug 9, 2008. 4:32 AMkanamin
says:
I remember doing this as a kid after I read it in some book. I couldn't handle the smell D:
Aug 15, 2007. 11:30 AMheyzuphowsitgoin
says:
if you put elmers glue in some type of liquad starch i think it was liquid potato starch it will feel a little like silly putty but you can mold it then it hardens and feels like plastic (i dont no about waterproof... just an idea that needs work)
Awesome! I've been wondering how this was done. I hear that this or something similar was developed by Da Vinci.
Aug 14, 2007. 6:47 AMPatrick Pending
says:
Yeah, I think your right. I remember Da Vinci's instructable a while back. Cheers, Pat. Pending
Aug 14, 2007. 1:34 AMryzellon
says:
Homemade plastic goes over the same process in more detail. (Still no discussion of casein, though.)
This is an excellent start, but it needs an explanation of how to mold things, and possibly an example of something you made with it. With a thorough explanation of what casein is an why it's in milk, this would be a contender for the science fair.
Exactly what I was going to say! For the sake of the instructable, you should also explain about hardening, and if it will come back to the same consistency with heat.
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