Ox gall

Ox gall (also spaced oxgall) is bile, also known as "gall", usually obtained from the gallbladder of cows, it is an ingredient in bile soap and mixed with alcohol and used as the wetting agent in paper marbling, engraving, lithography, and watercolor painting.[1] It is a greenish-brown liquid mixture containing cholesterol, lecithin, taurocholic acid, and glycocholic acid.

References

  1. ^ Piva, Gino (1984). Manuale pratico di tecnica pittorica: enciclopedia ricettario per tutti gli artisti, pittori, dilettanti, allievi delle accademie di belle arti e delle scuole artistiche (in Italian). HOEPLI EDITORE. ISBN 978-88-203-0459-1. Retrieved 2026-03-03.


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