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HC VIOLET NO. 4

Description

HC Violet No. 4 is a synthetic hair dye molecule primarily used in semi-permanent and temporary hair coloring products. This ingredient imparts a vibrant purple hue to hair and is particularly effective on pre-lightened or naturally light hair. As a semi-permanent dye, HC Violet No. 4 gradually fades over several washes, typically lasting 4-6 weeks depending on hair care practices and frequency of washing.

Chemically, HC Violet No. 4 belongs to the family of HC (Hair Color) dyes, which are designed to penetrate the hair shaft without the need for a developer. Its molecular structure allows it to adhere to the hair cuticle and partially enter the cortex, providing color without significantly altering the hair's natural pigment.

This dye is generally considered safe for use in cosmetic products when used as directed. However, as with all hair dyes, it may cause allergic reactions in some individuals. Patch testing is recommended before full application. HC Violet No. 4 is water-soluble, which contributes to its washout properties and makes it easier to remove from hair compared to permanent dyes. It is often combined with other HC dyes to create custom shades or enhance color depth in commercial hair coloring formulations.