The Chemistry Behind Hair Dye and Lightening > 자유게시판

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Transforming your hair with color or bleach involves far more than just applying pigment—it’s a deeply chemical interaction with your hair’s natural structure.

Human hair gets its color from two types of melanin: eumelanin, which produces brown and black tones, and pheomelanin, which contributes to red and yellow hues.

The combination and concentration of these pigments determine your natural hair color.

Hair coloring products typically contain dyes that either deposit new color onto the hair extension wholesale suppliers or chemically alter existing pigments.

These non-permanent formulas don’t enter the hair cortex—they simply adhere externally and rinse away after several shampoo cycles.

Permanent hair color, however, uses small dye molecules that penetrate the hair cuticle and cortex.

Inside the cortex, the dye precursors bind with peroxide to create larger, insoluble color compounds that remain locked within the hair.

Bleaching goes beyond coloring—it’s a powerful decolorization technique designed to strip natural pigment entirely.

Bleach typically pairs hydrogen peroxide with an alkaline agent like ammonia to lift the cuticle and oxidize melanin.

The peroxide opens the hair cuticle and then oxidizes the melanin, turning it into a colorless compound.

While bleaching achieves dramatic lightening, it simultaneously strips essential lipids and proteins that keep hair resilient.

The deeper the lift, the greater the structural compromise—this is why heavily bleached hair needs intensive repair treatments.

Maintaining the proper pH balance is essential for both processing and post-treatment hair health.

Naturally, your hair maintains a mildly acidic environment to keep the cuticle smooth and sealed.

To open the cuticle and allow pigment to enter, these products are formulated to be strongly alkaline.

Without this alkaline swelling, the colorants would be unable to penetrate deep enough to deliver lasting results.

After processing, the hair needs to be returned to a more balanced pH to close the cuticle and seal in the new color.

How well your hair absorbs color depends heavily on its porosity—the ease with which it takes in liquids and chemicals.

Heat, sun, relaxers, and prior color treatments all compromise the cuticle, increasing absorption rates and speeding up processing.

This can lead to uneven results if not accounted for during application.

A strand test is a standard practice to evaluate processing time, lift potential, and possible damage before committing to the full head.

Today’s dyes often include nourishing ingredients such as argan oil, hydrolyzed keratin, and silk proteins to buffer chemical stress.

Some products even include antioxidants to help protect the hair from oxidative stress during the coloring process.

Despite technological improvements, the core truth remains: color alteration = structural compromise, and must be approached with precision.

Understanding the science behind hair coloring and bleaching helps you make informed decisions.

Whether DIY or professional, understanding the process lets you avoid over-processing, reduce damage, and extend the life of your color.

Respecting the biology of hair means honoring its structure, not just covering it—and that’s the key to truly beautiful, enduring color.