dave_cheng1 Posted September 27, 2004 Share Posted September 27, 2004 I am trying to reuse quite a few chemical bottles that I once usedmany years ago. But I found some bottles have silver deposit insidethat will not go no matter how I wash them. How should I clean themso that I can use them again for color processing (C-41 and E-6)?The bottles are brown liter sized bottles that are really good asfar as I remember. I hate to have to throw them away. Any helpful infois greatly appreciated. Dave Link to comment Share on other sites More sharing options...
don_cooper Posted September 27, 2004 Share Posted September 27, 2004 I've always filled them with household bleach/water mix, let them sit a day, then rinse VERY THOROUGHLY!! Never had a problem with this method. Link to comment Share on other sites More sharing options...
andre_noble4 Posted September 27, 2004 Share Posted September 27, 2004 If you're going to use a similar chemical in it, I think it's enough to rinse them out thoroughly with hot water rinses. I don't think silver deposits will affect your processes. Link to comment Share on other sites More sharing options...
lowell_huff1 Posted September 27, 2004 Share Posted September 27, 2004 Bottles are very inexpensive, even brown. Why take a chance, to save two or three dollars; and loose the best shot you ever took? Link to comment Share on other sites More sharing options...
bujor_b Posted September 27, 2004 Share Posted September 27, 2004 Hi Dave: As always, my recommandations come from a chemist's point of view, fact which implies respect and knowledge about dangers in using chemicals. If you really love the bottles, Fisher Scientific sells Chromerge and 98% Sulfuric Acid, with which we make analytical cleaner for volumetry. I guess you don't have to go that far, but I wouldn't recommend bleach, an excessively chlorinated alkali, no matter what positive experience other people might have had, because it "photographically poisones" the glass silicate structure, and it is almost impossible to perfectly rinse it out (traces will affect color for paper and especially for film). To dissolve Silver Oxide and colloidal Silver, you may also use Hydrochloric Acid as it is sold at Home Depot as declogging agent containing Muriatic Acid. The stains you refer to are not entirely Silver though. You may first want to try to rinse your bottles with Acetone, IPA or Ethyl Alcohol. Any strong polar solvent will wash away the color developer stubborn residue formong reddish-purple washings. For fixer bottles, which get stained harder, it is infinitely more complicated. Sulfur in excess is formed in a highly adherent "plastic" polymeric form on the walls, and only Carbon Disulfide (very flammable) may solve the problem. As it was suggested, new bottles are not a big deal, but if, for any reasons, you'll want to start the cleaner's work, good luck! the rookie Link to comment Share on other sites More sharing options...
dave_cheng1 Posted September 29, 2004 Author Share Posted September 29, 2004 I have accumulated over 20 - 30 bottles that more or less need some cleaning. I could throw awayy 0.5 liter bottles. But the liter, 2 liters and gallon bottles are really wasteful to throw away. I will try to clean them to get rid of the black deposit first to look clean. Then I will pour in used, ready to dump chemical to prime them before using them again. For example, if I plan to use one bottle for color developer I will pour in used color developer and let it sit there for a day. I think the bottles should be useful afterwards. I found scrubing will really get the black stuff off. I might need to modify toilet scruber into a bottle scruber to clean the bottles. Some of the bottles are probably not cleanable. In that case I will dump them. Thanks for all the suggestions. Dave Link to comment Share on other sites More sharing options...
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