Small-Scale Chinese Types Production: Workshop Formula, Ratios & Method
In short: Small-Scale Chinese Types Production: Workshop Formula, Ratios & Method. This entry documents a formula & ratios taken from Chinese practical-technology literature, written for small-scale makers and home producers. The text below is the full English translation of the original Chinese workshop notes, covering materials and quantities, the step-by-step sequence, and the practical cautions recorded in the source. Roughly 6200 words of English technical text, translated and preserved without editing. It is intended for experimental and reference use, not for regulated or commercial certification.
Hair dye types and formulasHair dye products are cosmetics that contain dyes and are available in the form of lotions, creams, shampoos and lotions. Hair dye is not only used to dye white hair black, but also to bleach and decolor black hair and then dye it into other colors, such as auburn, brown, blonde, etc. Therefore, there are many types of hair dye products abroad. But no matter what kind of hair dye, it should meet the following conditions: (1) It should be able to dye the hair roots without damaging the hair; (2) It is non-toxic and does not cause allergies to the skin; (3) The color is stable and will not fade or change when exposed to air, sunlight, salt water, hair lotion, shampoo, and combing water.Depending on the firmness after dyeing, hair dye products can be divided into three categories: temporary, semi-permanent and permanent.Temporary hair dyes are only suitable for dyeing light-colored hair. They can deepen the color of light brown hair and add color to gray and white hair. The dyeing principle is to promote the interaction of positively charged dye ions with negatively charged hair to form a less stable colored compound. This compound cannot be mechanically removed from the hair surface, but it can be washed away with shampoo. Therefore, the retention time after dyeing is shorter. …
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