Archived posting to the Leica Users Group, 2007/07/22
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Peter, It is possible to test if your Xtol is still working.? The simplest way is to take a strip of film and in ordinary room light place a drop of Xtol on the emulsion side of the?film.? After 10 seconds, put another one a little further along.? After 20s more, put another one on.? Put another one on at 1 minute.? Rinse, fix and wash.? Without a densitometer it's hard to quantify and therefore it's hard to tell if it?has partly oxidised, but you should have spots of increasing density.? Xtol also tends to die quickly, so partial loss of efficacy is pretty unlikely.? LuGer John Black put me on to this and should be acknowledged as the source of this simple, elegant and effective method. The other way to do this is to buy some Kodak test strips, develop one in it and see how it looks and check with a densitometer.? That would be the most precise way to do it. Marty -- We've Got Your Name at http://www.mail.com! Get a FREE E-mail Account Today - Choose From 100+ Domains