Pigment is a colored substance in fine powder form, which is generally insoluble in water, oil and solvent, but can be uniformly dispersed in it. Pigment is the secondary film-forming substance of color paint. In the process of wood decoration, primer, putty and wood coloring are often used. Opaque color paint has a certain color and hiding power due to the addition of pigments. At the same time, the pigment can also enhance the durability, weather resistance and abrasion resistance of the coating film.
The dispersibility, oil absorption, hiding power, tinting strength and light resistance of the pigment have a greater impact on the performance of the paint and its coating film.
Dispersion is the size of the pigment particles. When other conditions are the same, the higher the degree of dispersion is, the finer the particles will be, the delamination phenomenon will be reduced during the storage of the paint, the smoothness of the paint film will be improved, and the oil absorption and hiding power of the pigment will also increase.
The amount of oil required when a certain amount of pigment is mixed with oil is the oil absorption of the pigment, which determines the oil consumption when mixing the paint.
The hiding power of the pigment refers to the ability of the pigment in the paint film to cover the substrate without showing it through the paint film, and is often expressed in grams of pigment required to cover a unit area. Obviously, pigments with high hiding power use less.
Tinting strength is the ability of a certain pigment to form a color after mixing with another pigment. When preparing mixed pigments, to achieve the same color tone, less pigments with strong tinting power are used.
The stability of pigments to light is light fastness. Some pigments with poor light fastness are affected by light
Under the environment, its color and performance will change to varying degrees, which reduces the surface decoration quality of the product.
Good coloring pigments should be bright in color, have high hiding power, tinting power, dispersion and low oil absorption, and have a stable effect on light.
Dyes are different from pigments in that they are colored substances that can be dissolved in liquids such as water, alcohol, oil or other solvents. The dye solution can penetrate into the wood and undergo complex physical and chemical reactions with the wood components (cellulose, lignin and hemicellulose), which can color the wood without blurring the texture of the wood, and can make the wood dyed bright and firm. s color.
Difference Between Pigment and Dye Compare the Difference Between Similar Terms
Pigments are mixed in the medium by physical dispersion, and dyes are dissolved in the medium. ?Pigments are in the form of particles in the medium, while dyes are in the form of molecules. The surface of many objects is easily damaged, such as wind and snow, sunlight, rain, heat, friction, oxidation, chemicals, etc. have erosive effects.
Pigment is any insoluble black, white or colored very very finely divided solid. Its main function is to bring color or special function to a medium, and the mixing with the medium is a physical mixing method.
颜料与染料的分别 ?颜料是不溶解于媒介中，染料是溶解于媒介中（如：水、溶剂、油、塑料或高份子等）。 ?颜料是以物理分散方式混和于媒体中，染料是溶解于媒体中。
什么是颜料
颜料需要分散，染料需要溶解。颜料存在媒体里是粒子状，染料是份子状。
油漆的定义 油漆与涂料没有明确的分别。很多物体表面是容易受破坏，例如风雪、阳光、雨水、热、磨擦、氧化、化学品 etc.有侵蚀作用。
这些表面需要油漆或涂料来保护。假如这油漆或涂料有颜色及光滑的表面，它便有装饰作用。
油漆的作用是保护和装饰。 油漆的成份 油漆的保护作用主要是树脂在基材表面形成保护膜，树脂同时有黏合力，可以黏在基材上。
树脂也可给与基材平滑光亮的表面，有罩光的作用。如油漆用作装饰，颜料是主要原素，给与颜色。
颜料需要树脂把颜料粒子黏在基材表面，在装饰漆里，颜料和树脂是重要成份。油漆若不是液体状，在施工上不容易黏在基材表面和平均分布，液体状的油漆可以渗透在基材表面的细孔，牢固地黏在表面，因此油漆需要溶剂。
油漆的溶剂可以是水、有机溶剂或油等。 油漆除了树脂、颜料和溶剂外，若需要改善性能，可加上各类性能的添加剂。
油漆的生产 溶剂把树脂溶解成为清漆。假如不需要颜色，清漆本身已是油漆。
一定份量的颜料放在清漆里，先高速搅拌把颜料湿润在清漆里，然后用研磨设备把颜料分散。这分散好的浆是一个浓的颜料浆（MILLBASE）。
颜料浆再加清漆冲淡便成油漆。 油漆送到客户车间后，一般加上溶剂稀释达到适合的施工粘度，然后可以施工。
颜料的分散 一般颜料商品的状态是凝聚在一起的粒子，我们需要把它们磨细，达到一定的粒子径才能有好的颜色、色饱和度、光泽、着色力 etc.。 颜料的分散有三个过程： 1.湿润 2.分散和均匀 3.稳定 －在油漆生产里，湿润是使用高速分散器(高速搅拌)。
－分散的设备主要是沙磨或珠磨，也有用三辊机和球磨；球磨今天比较少使用。 －颜料分散好以后，由于树脂或溶剂跟颜料的相容性，或颜料本身的物理性能等的影响，颜料的粒子会反粗，需要稳定，这方面要靠分散助剂。
Dispersing aids can only stabilize the dispersion and cannot speed up the dispersion time. The classification of paints is classified according to the application in foreign countries. At present, it is classified according to the resin in CHINA. Paints have different performance requirements in different applications. It is not easy to unify the requirements of users by classifying resins. Change to application to classify.
