Hi Dan
I haven't used any of the recipes in the Silver Gelatin book. I was warned by PE that some of the recipes were not accurate. That said, I have made a few different emulsions that can be found on thelightfarm.com, they are all working usable recipes, there is a treasure trove of information on her website and in Denise Ross' book (
https://www.blurb.com/b/6465389-the-light-farm ). the whole book is previewed Denise is awesome !
I imagine you are shredding it to wash ... if it is going to be strictly a paper coating emulsion you don't need to wash it, because It will basically be washed when you develop the paper. Unless I plan on coating on glass I don't wash my emulsion anymore...
When I make sea water emulsion it is 6% gelatin. ( between the 80cc of water in the salt water and 20cc in silver nitrate ) ... do you have around 6%.?
I have also made emulsions that didn't set right away and I re-warmed it and cooled it a 2nd time ( like you said you did ) and it worked OK...
be careful reheating &c. it can cause fogging. too much gelatin might cause frilling and the emulsion will lift off the paper stretch and set back down again...
Not sure if my observations were helpful
Good luck
John