can you add food coloring to white craft paint to make new colors instead of buying them?
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If the craft paint is non toxic chances are it already is colored with something similar for safety purposes(children). I would take a small amount and mix 3 drops of blue ans 2 drops of red = purple. It is always a 3:2 ratio. try it on some construction paper and see what happens. If it just a small amount then the waste is little. However , if it works and you are looking for intensity you may spend as much on food coloing as a normal paint.
If you just buy 5 “colors” of paint, you can mix them together to your heart’s content to get almost any color imaginable. The five would be:
red, yellow, blue
white, black (which aren’t really “colors”)
You’ll need the “purest” red, yellow, and blue you can get in order to mix the MOST colors so look for “crayon-type colors” of those three –in other words bright, clear, saturated colors.
You can find lots of info online on mixing colors if you don’t already know how, though you’ll have to understand a few basics and the “color wheel” first.
You can find some good links on those things too from the Color page of my site (link below).
My site deals with polymer clay but the same rules for color mixing would apply to all types of “pigments” in various mediums (including paints) –just not to mixing colors of “light”.
http://glassattic.com/polymer/color.htm
(…start with the subcategory called MORE INFO FROM ONLINE & BOOKS near the top of the page
….then read the category called COLOR WHEELS & DEFINTIONS)
HTH,
Diane B.