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There are two main types of color mixing: additive color mixing and subtractive color mixing. Additive color mixing is creating a new color by a process that adds one set of wavelengths to another set of wavelengths. Additive color mixing is what happens when lights of different wavelengths are mixed.
4 Answers 4. The difference lies in the word additive and subtractive themselves.... additive colors are colors which are pure, i.e. colors add up to form white light. A RED light looks RED because it emits RED light. while subtractive colors are impure.