Crossword: Colours
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3. The visual response to the wavelengths of light identified as red, green, blue, etc.
4. A white paint mixture consisting of a binder mixed with chalk, gypsum, pigment, or any combination of these.
6. Pigment bound in stick form like chalks.
7. A liquid, similar to varnish, which is usually sprayed over a finished piece of artwork to better preserve it and prevent smudging

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1. A tricky medium to use but can achieve beautiful effects
2. A type of watercolour paint, which results in a stronger colour than ordinary watercolour
5. A golden brown tint sometimes applied to black-and-white pictures. It can give the finished print in an antique appearance