<html><head></head><body><div style="color:#000; background-color:#fff; font-family:verdana, helvetica, sans-serif;font-size:14px"><br><div class="qtdSeparateBR"><br><br></div><div style="display: block;" id="yui_3_16_0_1_1456923308150_91089" class="yahoo_quoted"><div id="yui_3_16_0_1_1456923308150_91088" style="font-family: verdana, helvetica, sans-serif; font-size: 14px;"><div id="yui_3_16_0_1_1456923308150_91087" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"><div id="yui_3_16_0_1_1456923308150_91086" class="y_msg_container"><div id="yui_3_16_0_1_1456923308150_91269">Hello Group</div><div id="yui_3_16_0_1_1456923308150_91270"><br></div><div dir="ltr" id="yui_3_16_0_1_1456923308150_91271"> With regard to Nitrate film, if it is stable, it has a flash point approximately the same as a piece of paper. <br></div><div id="yui_3_16_0_1_1456923308150_94549" dir="ltr"><br></div><div id="yui_3_16_0_1_1456923308150_94548" dir="ltr"> But decomposed nitrocellulose is extremely dangerous. And nitrocellulose, when decomposing, releases nitric acid which further catalyzes the decomposition. The decomposed film does not have a particular odor. The decayed film will turn into a rust colored powder which is extremely flammable and almost impossible to extinguish as the reaction of burning releases it's own oxygen. <br></div><div id="yui_3_16_0_1_1456923308150_96270" dir="ltr"> If you find old film, and it smells of vinegar, it is triacetate or "safety film". <br></div><div id="yui_3_16_0_1_1456923308150_96309" dir="ltr"><br></div><div id="yui_3_16_0_1_1456923308150_96288" dir="ltr"> Yours Truly</div><div id="yui_3_16_0_1_1456923308150_96289" dir="ltr"> David Keleshian</div><div id="yui_3_16_0_1_1456923308150_96290" dir="ltr"> former telecine colorist <br></div><div id="yui_3_16_0_1_1456923308150_96310" dir="ltr"> CBS Television City.<br></div><br><br></div> </div> </div> </div></div></body></html>