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Effect of Pigment Particle Size on Organic Pigments
Release time:
2023-12-21
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The particle size of organic pigments plays an important role in pigment application performance, such as pigment characteristics, coloring strength, transparency, hiding power, gloss, vividness and light fastness, etc.
The particle size of organic pigments plays an important role in pigment application performance, such as pigment characteristics, coloring strength, transparency, hiding power, gloss, vividness and light fastness.
First, the effect of pigment particle size on pigment hue
Pigments of the same chemical structure, other conditions are the same, the size of the pigment particle size affects the color hue. For example:
Yellow pigment varieties, when the particle size is small, show green yellow, large particle size, show red yellow.
Orange pigment varieties, when the particle size is small, show yellow orange, large particle size, show red color.
Red pigment varieties, when the particle size is small, the hue angle increases, showing yellow light, when the particle size is large, the hue angle becomes smaller, showing blue light.
Blue pigment varieties, small particle size, hue angle increases, showing red light, large particle size, hue angle becomes smaller, showing green light.
Green pigment varieties, small particle size, hue angle increases, showing blue light, large particle size, hue angle becomes smaller, showing yellow light
Organic pigment particle size also affects its light fastness. When the pigment particle size becomes smaller and the specific surface area increases, chemical oxidation-reduction reaction is easy to occur under light irradiation, resulting in pigment fading and light fastness reduction.
The coloring strength of organic pigments is also related to the size and distribution of particle size, and the reduction of particle size can lead to an increase in coloring strength, and the coloring strength is also related to the particle shape.
The transparency of organic pigments is also related to the size of the particle size, the pigment particle size increases, the pigment hiding power increases, the wetted surface decreases, showing good fluidity, the pigment particle size decreases, the pigment transparency increases, the wetted surface increases, and the fluidity decreases.
The light fastness of organic pigments is also related to the particle size (specific surface area). The light irradiation process first occurs in the particle surface layer, and the pigment particle specific surface area is large, and the light fastness of the pigment is reduced.
To sum up, the pigment particle size, pigment coloring ability to reduce, high hiding power, good fluidity, light fastness to reduce, on the contrary, the pigment particle size is small, pigment coloring ability, good transparency, flow degree is reduced, light fastness effect is enhanced.
Key words:
Organic pigment, particle size, pigment, fastness, coloring
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