Thanks for your help Aschal. It isn't orange so it must be lemon! I think it was left over from some thiorea toner experiments (Eddie Ephram's books). BTW What's the other name for thiorea? AZ Build a Lookaround! The Lookaround Book, 4th ed. Now an E-book. http://www.panoramacamera.us > -------- Original Message -------- > Subject: Re: image transfer-was thought this was interesting > From: Achal Pashine <achalpashine@xxxxxxxxx> > Date: Tue, May 24, 2005 12:50 pm > To: List for Photo/Imaging Educators - Professionals - Students > <photoforum@xxxxxxxxxxxxxxxxxxxxxx> > > > > > BTW does anyone know how to identify amonium dichromate? > > > Alan, > If you are sure that you have it in your lab and if only one among many > bottles has bright orange crystalline substance in it, then it is ammonium > dichromate. It is highly oxidizing. wear safety glasses. > thanks, > Achal
