How should Ox Gall be used to improve flow and acceptance on paper?
Ox gall increases wetting, therefore two colours will bleed into each other more when using them wet into wet on the paper. If painting in lines, the improved flow from the ox gall will produce a more even colour line which may go further. Some water colour papers are quite hard sized and may resist water colour washes. Using ox gall will wet the surface and allow the wash to spread. The amount used depends on the degree of wetting required, initially add a few drops into a jar of water.
