Archived posting to the Leica Users Group, 1999/02/18
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Photoflo works because it is a soapy solution with a pH above 7. Perhaps around 8. This is why it feels slippery and allows the water to run off the film in sheets, rather than ball-up in droplets... and then dry to leave a spot. Water also usually has a pH slightly above 7. So there "could" be a difficulty in absolutely and completely washing away all of the photoflo "stuff" with water. But I personally have never had a problem of "photoflo buildup". To eliminate the problem, should you believe you have such a problem, wash (soak, agitate) your plastic reels in a very mild acetic acid solution (really weak stop bath). This will cut any possible photoflo build-up. Then wash in normal water and dry. Jim At 01:03 PM 2/18/99 -0400, you wrote: >Ken: > >If you have stainless reels, I would put reel and all in, making sure the >reel gets cleaned well afterwards. Do not put plastic in the photoflo as >it reacts with the plastic and can cause a buildup and cross chemical >contamination. I use plastic reels and just split them in half while the >film is on it and dump the film in the reeled up state in to a 2 cup >measuring cup with photoflo. > >Regards, > >Robert