maybe I will try... But I forgot to mention that I used tap water instead of distilled water. For some weird reason, the batch with distilled water didn't work well. The one I'm using is the second one, made with tap water. It works fine, no spots, no fogging, etc. Since I use tap water, there could be some salts in the emulsion already. My tap water is indeed alkaline.
"Silver gelatin" suggests mixing B (silver nitrate) into A (pot. bromide) at a rough 5ml over a period of 10 minutes. Do you think that raising considerably the mixing time of the two emulsion components will determine an increase in speed at the cost of a lower contrast? Would there be any risks of chemical fogging?
Ah, and while I'm here I have another question for you master of photographic gelatin: how long the shelf life of such emulsion would be? Since this batch worked very well I was considering to prepare a larger amount (say 500 ml or up to one liter). Of course I'd store it in a dark bottle in the fridge. Since the emulsion contains active gelatin and is unwashed, I can't compare it with commercial emulsions... I have had some of these for over than one year without problems... Also, how about re-melting? While many people say that is advisable to break the gelatin in smaller pieces to avoid re-melting, I actually never did that - again with commercial emulsions. But never had a problem.
Last edited by Fulvio; 12-02-2006 at 03:32 PM. Click to view previous post history.