Acid dye

An acid dye is a dye that is typically applied to a textile at low pH. They are mainly used to dye wool, not cotton fabrics. Some acid dyes are used as food colorants, and some can be used to stain organelles for medical microscopy.

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Source: Wikipedia · Image: Wikimedia Commons · Public domain

TODYE

The craft of color — fabric dyeing, natural dyes, and the calculators behind every batch.

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