u/TremulousHand

I've been interested in getting into paper marbling, and obtained the relevant supplies. But a question has come up. I bought my alum from Colophon, and their recommended mix is 3/4 cup of alum dissolved in one gallon of water. But every other source I consult says 1/3 cup of alum in water. For reference, here's Colophon:https://www.colophonbookarts.com/marbling/alum-aluminum-sulfate. And here's Talas https://blog.talasonline.com/post/two-methods-to-alum-paper-for-water-marbling and Galen Berry https://marbleart.us/AlumInfo.htm. I bought alum from Colophon so plan on following their ratio for now. But if I really don't need that much, it would be great. The shop is currently on hiatus, otherwise I would email directly and ask.