This Winsor & Newton Ox Gall Liquid will reduce the surface tension and improve the flow of your watercolours. It will allow you to easily wet paper surfaces by just adding 3 or 4 drops.

- This liquid is water-based.
- When mixed with water, it will increase the flow of your colours and make it easier to wet paper surfaces.
- There is 75 mL of liquid in this bottle.
- It will reduce the surface tension and improve the flow of the colour when mixed with water.
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