Preparation method of foundation make-up premix having minimal color difference

Abstract

The invention relates to a preparation method of a foundation make-up premix having minimal color difference, which comprises the following steps: (1) performing unified surface treatment on various raw material powder of the foundation make-up premix, and ensuring that the surface properties tend to be consistent; (2) uniformly stirring the treated raw material powder at a high speed to obtain the foundation make-up premix, performing subsequent treatment on the foundation make-up premix mixed by a high-speed stirrer through an airstream smashing method, and ensuring that the powder is uniformly dispersed; (3) measuring the color difference; (4) performing color mixing; and (5) monitoring the color difference, and ensuring that the color difference of the foundation make-up premix delta Ecmc is less than 0.8. According to the invention, the magnitude of the color difference is quantitatively analyzed in a digitization manner by means of an instrument; unified surface treatment is performed on various powder, so that unified surface properties are achieved, thereby ensuring that the powder can be uniformly dispersed and distributed in a dispersion medium or emulsion system; the airstream smashing method is adopted, thereby ensuring that the powder is thoroughly dispersed without bonding and accumulation phenomena; and the color of each batch of premix is comprehensively ensured to be uniform and consistent.

Description

technical field [0001] The invention relates to a preparation method of cosmetic raw materials, in particular to a preparation method of foundation premix with extremely small color difference. Background technique [0002] Foundation cream / liquid is a very important cosmetic category, and it is also the basis for a good makeup effect. Cosmetics manufacturers usually provide foundations of different colors (such as dark skin and light skin) by adjusting the ratio of various powders according to the user's skin color. [0003] Powders commonly used in foundation cream / liquid include titanium dioxide, iron oxide (iron oxide yellow, iron oxide red, iron oxide black, iron oxide brown, etc.), talcum powder, zinc oxide, etc.; in order to improve brightness, feel, adhesion and other properties Indicators, functional powders such as boron nitride, bismuth oxychloride, and spherical silica are often added. [0004] In order to suit different formulation systems or achieve different...

AI Technical Summary

Problems solved by technology

Otherwise, the surface of titanium dioxide (the most important component of the foundation to play a covering effect) is usually coated with inorganic materials such as alumina and zirconia, which are very hard (such as alumina, commonly known as corundum, which is second only to diamond in hardness. ), it is easy to wear stainless steel; the worn iron filings will pollute the foundation

[0017] These high-quality colloid mills or three-roll machines are expensive, and most small and medium-sized cosmetic companies only use ordinary quality grinding equipment, which cannot prevent secondary pollution

[0018] 2. Defects of pre-mixing with high-speed mixer

However, due to the poor uniformity of this simple dry treatment, the scope of application is narrow (many surface treatment methods cannot use dry treatment), so the degree of improvement is limited

[0022] B. There is no improvement in chromatic aberration control

[0023] 3. Defects in purchasing the same batch of toner in large quantities

Therefore, the color difference of foundation products is a long-standing problem, so many people think that the color difference of liquid foundation cannot be solved at all.

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