- Joined
- Sep 10, 2002
- Messages
- 60
I thought I'd try 6% in Sodium Sulfite in Rodinal just to see what happens. So I got 1 lb of Lauder SF ("photo grade"), mainly because it was $6.50 and the Kodak 1lb bottle was $8.50. Yeah, I'm cheap! 
The Kodak one spells out that it's Anhydrous, but the Lauder one doesn't say. If it's monohydrous, does that mean it's half water by weight, or that there's a 1:1 SSF-to-H2O molecular ratio and the weight ratio is in relation to their molecular weights? (Sorry if this sounds silly, but I haven't spent a single attosecond thinking about chemistry since high school 20 years ago.) I would guess the SSF is a much larger molecule and many times heavier than water. Basically, are they the same thing, or should I use twice as much of the Lauder for the same W:V ratio, or something inbetween? Also, I don't have a scale, is there a way to convert SSF weight to volume? E.g. if it's 1.5x the weight of water, I'd use 6%/1.5 by volume which would be pretty easily measured by displacement. I do understand that the measurement isn't critical, but I'd like to have a method to the madness.
The Kodak one spells out that it's Anhydrous, but the Lauder one doesn't say. If it's monohydrous, does that mean it's half water by weight, or that there's a 1:1 SSF-to-H2O molecular ratio and the weight ratio is in relation to their molecular weights? (Sorry if this sounds silly, but I haven't spent a single attosecond thinking about chemistry since high school 20 years ago.) I would guess the SSF is a much larger molecule and many times heavier than water. Basically, are they the same thing, or should I use twice as much of the Lauder for the same W:V ratio, or something inbetween? Also, I don't have a scale, is there a way to convert SSF weight to volume? E.g. if it's 1.5x the weight of water, I'd use 6%/1.5 by volume which would be pretty easily measured by displacement. I do understand that the measurement isn't critical, but I'd like to have a method to the madness. 
