Thanks for the correction, Bob. I actually did a bit of googling, instead of just recalling from memory, and found that the Cellulose acetate has an ignition temp of 800F and the Estar base 900F. I'm assuming the cellulose nitrate ignited at much lower temperatures.
On 11/19/05, Bob Shell <[EMAIL PROTECTED]> wrote: > > On Nov 18, 2005, at 10:17 PM, Scott Loveless wrote: > > > Most likely, it means that the film has an Estar (or whatever Kodak > > called it back then) base instead of a celluloid base. The safety > > film ignited at a higher temperature than the older celluloid stuff. > > Thus - safety film. As far as EI goes, you'll just have to wait for > > someone more knowledgeable than me to reply. > > > Nope. Cellulose acetate was the "Safety Film". It replaced > cellulose nitrate, the stuff that tended to spontaneously combust. > Estar (same as Mylar) was a much later development. > > Bob > > -- Scott Loveless http://www.twosixteen.com -- "You have to hold the button down" -Arnold Newman
