Re: LC-1 developer question
I don't know the answer yes/no, but sulfite and bisulfite are the same thing once you dissolve in water and adjust the pH to where you intended. If you have the same molar concentration of (sulfite + bisulfite) in the water, and same molar concentration of Metol, the net result is the same. And if this is the case, the keeping properties are also the same. Just because one formula contains sodium bisulfite (a misnomer for metabisulfite) as an ingredient and the other doesn't, it does not entail in longer shelf life. In other words, there are many possible combinations of ingredients (formulae) that make the same developer solution. I recommend that you do not worry too much about these things unless you are a chemist. Your time is better spent in figuring out how best you can get results you want by adjusting the amount of stock B component. -- Ryuji Suzuki "Make something religious and people don't have to deal with it, they can say it's irrelevant." (Bob Dylan, Biograph booklet, 1985) From: david drake <daviddrakephoto@sympatico.ca> Subject: Re: LC-1 developer question Date: Fri, 28 Mar 2008 09:00:54 -0400 > I just looked at the formula for LC-1B. It contains as much > sodium sulphite as I had used in my concentrated version of > LC-1. However it also contains the bisulphite. I'm curious > if there have been similar problems of crystalization with > LC-1B or if perhaps the bisulphite helps keep the metol / > hydroquinone in solution better? I understand that it would > extend its storage life.
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