Basic knowledge of cosmetics: full of chemical raw materials dry

a lot of people don't know what cosmetics raw materials contain? Actually there were too many knowledge about cosmetics manufacturer, raw materials, manufacturing processes, product efficacy, packaging materials, packaging and so on. generation of processing enterprises to popular science under the basic knowledge of chemical raw materials.

1, the physical and chemical indicators: the material of the basic physical and chemical properties, odor, color, status, characteristics, specific gravity, melting point, boiling point, solubility, etc.

2, density: symbol & rho; Also known as the mass density, defined as: mass divided by volume, namely & rho; =m/V。 Unit is commonly used for: Kg/m3, g/mL.

3, elemental and compound elemental: consisting of one element material elemental; By a variety of elements of substances called compounds.

4, viscosity, dynamic viscosity. Used to think that it is the dynamic viscosity and kinematic viscosity and relative viscosity of the three known uncertain. Symbol for & eta; ( μ ) Defined as & eta; =τ; / D。 Its & tau; As the shear stress; D to the velocity gradient on the perpendicular to the direction of the flow layer. The fluid flow shear stress divided by the velocity gradient in the direction of flow layer. The SI unit for palmer, seconds, palmer, second is commonly used in chemical technology. The CGS system unit used is moored, and cp.

5, organic and inorganic substances: material other than the hydrocarbon compounds and derivatives, known as inorganic substances; Made up of hydrogen and carbon element called organic compounds and derivatives.

6, freezing point: temperature at which a liquid into a solid.

7, small molecules and polymers ( Polymers). : the small molecular weight compounds called small molecules; Large molecular weight compounds called polymer ( Also called macromolecular) Or polymers, such as resin, etc.

8, hardness:

( A) A quality index of the water, the feature of salt in water. Is water soluble calcium salt, magnesium salt and iron salts in mg equivalent concentration of total value.

( 2) A physical properties of minerals. The mineral's ability to fight a foreign machinery especially described the role.

( 3) A mechanical properties of materials. Material resistance or other substances described the ability of its surface.

9, purity: the content of a main material, the higher the content, the higher purity.

10, the level of purity: generally divided into four levels.

industrial-grade: contains food grade and pharmaceutical grade, electroplating grade, purity is higher than general industrial, less than chemically pure, or in some major indicators on demand is high;

pure chemistry: chemical reagents, with a blue label, the purity higher than that of industrial-grade, below the analysis of pure;

analysis: pure chemical reagents, with a red label, higher than that of chemical purity pure, pure is lower than the optimal level;

excellent level of pure: chemical reagents, with a green label, higher purity analysis of pure, is currently the highest.

11, pure and mixture, single composition of substances called pure, by a variety of substance consisting of a mixture. Such as nitrogen, oxygen, is pure; Air is a mixture.

12, flash point: the gas meet the minimum temperature of burning material.

13, melting point: the temperature of the material from solid state to liquid state.

14, fire point: the temperature at which the material is heated to burn.

15, roughness, surface roughness. In order to Ra said.

16, the boiling point: the temperature of the substance from liquid to a gas state.

17, drop point said: one of the markers of grease properties. Grease samples under the condition of standard heat melt fell from the nozzle.

there are a lot of chemical raw materials base knowledge, this is a simple list often appear some basic knowledge of, these are cosmetics on generation of processing enterprises of the most basic knowledge.

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