This got me curious. I did a little (about an hour's worth) research into it. I found lots of information about home experiments/projects to make glue out of casein/milk. I found nothing on any commercial producer that indicated that they use casein or any other milk product in their glues. I found a few sites that supported animal rights that claimed that "many glues contain casein (a milk derivative) and other animal products" (this quotation is typical of what I found), but never offered any proofs or citations or anything to back up (at least) the casein statement. From what I can see the claim of other animal products/byproducts is probably valid at the commercial level, but not the casein/milk. Of course, I'm still not going to eat of them . . . Susan Gallant wrote: > I was reading a science book with my kids a few days ago and when we got to the page about glue it said some glues are made with milk. >