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How To, Jan Thomson, Maimeri, Ox Gall, Water Colour Paint -

If you’re a watercolour painter you will probably have heard of Ox Gall. This is a slightly unpleasant smelling liquid extracted from the liver of cattle that has been used for many years to achieve “smoother” effects with watercolour paint. It is basically a wetting agent, meaning that the paper will take the paint more readily. Paper which is heavily sized almost repels the paint so that it sometimes beads. Ox Gall will allow the watercolour to be absorbed, making blending much simpler. So, here goes my trial of Maimeri Ox Gall… On the left is a test patch painted...

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