Thanks Martin,Martin wrote:Yes. I would also have thought there might be other factors than bloom strength that play an important role here. I used to consider bloom strength as something affecting the setting and melting point of a gelatin at a given concentration. By other factors I'm particularly thinking of the chemical composition of a particular gelatin. In one of his latest posts here, Jeff alluded to the importance of the sulfur groups.
I doubt if John remembers this many years ago when I first started. I got a sample container of Great Lakes (250 bloom) gelatin and nothing I did could get it clear. John suggested various hardening methods, light/ fixer etc as well as IPA temperatures, water baths and sacraficing goats and alike with minimal effect. After spinning my wheels for a few months and concidering taking up underwater bocci ball when I bought some knox and pow became the internationally famos DCG holographer you see today.