Recent content by Bokaj14

Peper grain on new emulsion: Now even crazier peper grain, changes that I have maid from last emulsion (while speed is stop or two lower): - seeding (5% of silver solution for 5 minutes before started addition of other silver) - different photo gelatin vendor - perastaltic pumps tube under...

Do you have PEs book? Can you send me PM as I can't as I don't have 20 posts jet? Also for seeding do you know how much silver do you add and how long I should wait till I continue with the rest?

That is probably my problem yes. Thanks. My peristaltic pump is not making completly steady flow but average is very consistent, I would like to add it slowly and consistent with a pump as I would like to make emulsion of higher speeds. Lovering pumps tube under surface would hopefuly fix pepper...

Thank you for this thorough answer. 3) I am droping it from few centimeters (inch or inch and a half) above surface and first few drops i could se cump. Introducing it under surface would probably really help with that as solution would mix with drop before drop would actualy form at all. 2) For...

Images of my plates with peper grain and my emulsion making setup: I saw a few posts from a long time ago, especially ones mentioned by PE, stating that "pepper grain" can be caused by improper mixing or by too little or poor-quality gelatin. I was using only 500 RPM with a magnetic stirrer...

Do you have any actual numbers how muct PMT would be used as antifogant and how much TAI to stop reaction at the end. So the coating can be done slowly and not to worry to fog emulsion by heating it to coat plates?