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If a sebaceous gland duct is blocked by accumulated sebum, a whithead apears on the skin surface. If the material oxidizes and dries, it darkens to form a blackhead.

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βˆ™ 14y ago
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βˆ™ 7mo ago

Blackheads are formed when pores become clogged with a combination of dead skin cells, oil, and bacteria. The clog oxidizes when it comes into contact with air, turning it black. This oxidation process is what gives blackheads their dark color.

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Q: What makes black heads black?
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