A concealer or colour corrector is a type of makeup used to mask dark circles and other small blemishes visible on the skin. Concealers usually do a good job of hiding blemishes by blending the imperfection into the surrounding skin tone. This product is mainly used by women, but use among men is increasing. Both concealer and foundation are typically used to make skin appear more uniform in color. These two types of cosmetics differ in that concealers tend to be more heavily pigmented, though they are available in a wide range of opacity. Also, foundation is usually applied to larger areas. The first commercially available concealer was Max Factor's Erace, launched in 1938. Concealer can be used alone or in conjunction with foundations.
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