I could probably just call Bostick and Sullivan and ask them but I will ask here first.
I have used a little bit of tween 20 in the past at the 10% strength. It was very old and a hand me down from another photographer. It definitely helped make smoother prints but I had a problem with sparkles left on the surface of the paper that stayed even after washing and drying. I heated the bottle of tween up and gave it a good shaking and then I used hot developer for my platinum print and the sparkles went away.
I have two questions now. I just ordered a 50% solution of tween from B&S and I know I will need to dilute it for using for 8x10 and smaller prints. Is there anything to worry about other than just using some distilled water?
Also is the sparkles problem I had with the old stuff due to age or is it a problem inherent in Tween? Is there another way to avoid it?
Thanks for the help