don_sigl Posted June 26, 2002 Share Posted June 26, 2002 Does anyone know if there is a conversion process for translating "desiccated values to anhydrous or monohydrous values? I've got some formulas I want to try that list preservatives and accelerators amounts in desiccated form. Thanks, Don Link to comment Share on other sites More sharing options...
wayne__ Posted June 26, 2002 Share Posted June 26, 2002 Its the same thing, for all practical purposes. Link to comment Share on other sites More sharing options...
simon parker Posted June 26, 2002 Share Posted June 26, 2002 Hi Don, <p>You could try this site, which has conversions from one form to another for a range of common photographic chemicals: <a href=http://www.jackspcs.com/chemconv.htm>http://www.jackspcs.com/chemconv.htm</a> </p> <p>There is other useful advice on the site too. I guess if you need to be accurate you have to be careful that the amount of water present hasn't changed too much with storage for some chemicals.</p> Hope this helps, Simon Link to comment Share on other sites More sharing options...
pete_andrews Posted June 27, 2002 Share Posted June 27, 2002 Desiccated IS anhydrous. The two words mean the same thing. Link to comment Share on other sites More sharing options...
ed b. Posted June 27, 2002 Share Posted June 27, 2002 According to Jacobson & Jacobson (DEVELOPING), there are three forms of sodium carbonate: crystalline, anhydrous (or dessicated), and mono-hydrated. 100 parts by weight of anhydrous sodium carbonate equals 270 parts by weight of the crystalline salt or 120 parts by weight of the monohydrate. "These equivalents are not exact, but are quite near enough for all practical purposes." So, if your formula says 100 parts anhydrous or dessicated, you can substitute 120 parts monohydrate. Link to comment Share on other sites More sharing options...
don_sigl Posted June 27, 2002 Author Share Posted June 27, 2002 Thanks all for the help. The Ansco formulas I'm looking at all have the Sodium Sulphite ingredient listed as desiccated. I am going to mix under the assumption that this means the same as anhydrous Don Link to comment Share on other sites More sharing options...
ann_clancy3 Posted June 28, 2002 Share Posted June 28, 2002 check Anchell Darkroom Cookbook. There are conversion tables in the back. Link to comment Share on other sites More sharing options...
wayne__ Posted June 29, 2002 Share Posted June 29, 2002 check Anchell Darkroom Cookbook. There are conversion tables in the back.------------ This came up a a little while ago. the table pretends to be a Universal converter, but it is really only good for sodium sulfite. But there is no conversion from dessicated to anhydrous Link to comment Share on other sites More sharing options...
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