The BladeForums.com 2024 Traditional Knife is ready to order! See this thread for details:
https://www.bladeforums.com/threads/bladeforums-2024-traditional-knife.2003187/
Price is $300 ea (shipped within CONUS). If you live outside the US, I will contact you after your order for extra shipping charges.
Order here: https://www.bladeforums.com/help/2024-traditional/ - Order as many as you like, we have plenty.
Thomas Linton said:I have read that boiling water or harsh cleaning chemicals liberates some mutagentic chemicals from the colored Lexan. The maker denies. Chemists at Case Western Reserve University say it's so. For this reason, I've stuck to Nelgene.
Will said:huh? could you elaborate on this please.
thanks
Will
Thomas Linton said:Happy to do so.
The research is not complete; however, two U.S. university studies and German and Japanese studies have found that heat or harsh detergents (Think dish washer. Most detergents for dish washing machines can etch glass.) cause a leaching of bisphenol A from Polycarbonate 7, AKA "Lexan," the material used for the popular colorful water bottles, including those sold under the brand "Nalgene."
While the plastics industry and at least one other study claim that humans handle bisphenol A better than lab rodents and downplay the results of the studies (Remember, tobacco does not cause cancer.) , the chemical is known to cause human aneuplody, a genetic defect that is the leading cause of miscarriages and birth defects in humans. (Now if we could just get people to volunteer for studies, Nalgene Corp. might be satisfied.)
The problem does not appear to occur in the old style (more durable and therefore longer-lasting) flexible ("milk jug") Nalgene bottles that have been around for decades. (Marketing Dept: "CURSES!")
References:
Current Biology 13: 546-553
Environmental Health Perspectives 110:A703-707
Human Reproduction 17:2839-41
The advice, is to use HDPE or LDPE bottles rather than Polycarbonate 7. If you must use Lexan bottles, the advice is to hand wash using milder detergents (type used to hand wash dishes), do not use them for hot beverages, and do no use them for microwaving.
I'm assuming that when you say other uses than "water" that you mean drinking water. That said, I use mine as a hot water bottle to make my sleeping bag warmer. You can pour boiling water into a lexan bottle without damaging it. It adds quite a bit of warmth.