This is an excellent resource I just found explaining why I have been struggling to find any comprehensive directions or a oral history of paper marbling
Four tablespoons aluminum sulphate
One quart of water, microwaved for five minutes- account for evaporation?
This solution was very different in appearance and smell from any previous batches I have made- and dried out my skin wherever it made contact. Hopefully this signifies a stronger potency and will make a difference when marbling.
Coated 19 sheets of various paper types and sizes
for the first time tried to cat objects with aluminum sulphate solution- two pre-primed bones, and a glass jar