Hi Herzeleid.

I never thought of that. I think you're right. You're right. I salted the paper with a solution of citric acid, gelatin and salt. I guess it isn't enough citric acid. I work by pouring out about 5mls then use a syringe to measure out what I need. I guess I can mix some citric acid into the the batch I'm using. Or possible work faster. Thanks for the suggestion.