Properties and uses of permanent violet

In the large family of chemical pigments, permanent purple RL is a very important pigment.

1. Basic information

It has a clear name in both Chinese and English. Chinese name: Yonggu Purple RL; English name: Pigment Violet 23. At the same time, it has many nicknames, such as permanent purple, pigment purple 23, fast purple Rl, C.I. Pigment purple 23 etc. Its nicknames include 51319 CI 51319, Pigment Violet RL, Pigment Violet 23, and its CAS number is 6358-30-1. These names are like its identity markers, which facilitate people to accurately refer to and identify it in the chemical industry.

Second, physical and chemical properties

1. Hue or color light

- Permanent Violet RL's hue or color light presents a distinctive bluish-violet color. This blu-ray violet has a unique visual effect in a wide range of pigments, providing vivid and specific color performance in a variety of application scenarios. For example, in some areas of artistic creation or high-end decoration, this special color light can create a mysterious and profound atmosphere.

2. pH value

- When it is in the form of a 10% slurry, the pH is 6.2. This pH value indicates that it has certain acid-base properties, which is important for its stability in different chemical environments and compatibility with other substances. In many industrial processes, pH stability is one of the key factors to ensure product quality.

3. Oil absorption

- Its oil absorption is between 38 and 53. This index of oil absorption has a great impact on the application of pigments in paints, inks and other products. The different amount of oil absorption means that it has a different absorption capacity when mixed with oil substances, which affects the texture of the final product, drying speed and color saturation.

4. Water soluble matter

- The water soluble content of permanent purple RL is very low, ≤1. The properties of this low water soluble substance make it perform well in some applications with high water sensitivity. For example, in outdoor paint coatings or plastic products that need to be exposed to water for a long time, low water solubility can ensure that the pigment will not dissolve, fade or other adverse changes due to the action of water.

5. Sieve residue (100 mesh)

- Sieve residue (100 mesh) ≤5. This index reflects the particle size distribution of the pigment. The low sieve residue value indicates that most of the pigment particles can pass through the 100-mesh screen, indicating that the pigment particles are relatively fine and uniform. In the printing ink, the fine pigment particles can better fill the tiny pores of the paper, making the color of the print more uniform and bright.

6. Cover power

- It belongs to the transparent type of covering power. This transparent type of covering power has unique advantages in some special applications. For example, in the production of some layered art or special effect coatings, transparent permanent purple RL can add a unique color effect to the surface of the object without blocking the underlying color or texture.

7. Heat resistance, light resistance, water resistance, acid resistance, alkali resistance, oil resistance, paraffin resistance, solvent resistance (xylene) and light fastness

- Permanent Violet RL has a heat resistance of up to 200 ° C, which makes it very widely used in high temperature environments. For example, in the baking process, the high-temperature baking process will not change its color or reduce its performance.

- Its light resistance is grade 5, water resistance, acid resistance, alkali resistance, oil resistance, paraffin resistance and solvent resistance (xylene) are also grade 5. These excellent properties show that permanent Violet RL has strong stability under a variety of complex environmental conditions. Whether it is exposed to sunlight, water, acidic or alkaline substances, or contact with organic solvents such as oil, paraffin or xylene, it retains its color and properties.

- Its light fastness reaches 7-8, which means that under long lighting conditions, its color can remain relatively stable and will not fade or change color easily. This is a key performance for outdoor advertising, automotive painting and other applications that are exposed to sunlight for a long time.

Third, product use

1. Use in paint

- Permanent Violet RL has excellent properties such as high sun resistance, weather resistance, fastness to migration and thermal stability. In the field of paint manufacturing, especially high-grade paint has a wide range of applications. When it is mixed with phthalocyanine blue, a reddish blue hue can be obtained. This characteristic makes it recommended as a colorant for the manufacture of various high-end paints, such as automobile refinish paint, agricultural vehicle paint, etc. In automobile refinish paint, this unique color mixing effect can make the repaired part more matched with the original body color, to achieve almost perfect repair effect. In the field of agricultural vehicle paint, it can provide lasting bright colors and withstand the test of various harsh environments outside the household.

- Permanent Purple RL also has a special role in the manufacture of white paint. It can be used as a "white carving agent" with white pigments, just add 0.05-0.0005% of the amount of titanium dioxide can cover the yellow light of titanium dioxide, so as to get a pleasing white. This micro addition can produce a significant effect of the property, not only to save costs, but also to improve the color quality of white paint. In addition, permanent Purple RL also has very good recoating resistance in baking paint. This means that when painting the paint several times, it can ensure that the color and performance remain stable after each painting, and there will be no color deviation or coating quality decline.

2. The use of printing ink

- When permanent violet RL is used in printing inks, it is often mixed with inks made of phthalocyanine blue or directly with phthalocyanine blue powder to obtain a reddish light blue. When modulating offset printing ink with 1/1 standard color depth, its use is 8.7%, and when modulating offset printing ink with 1/3 standard color depth, its use is 5.6%. Both of these inks have a light fastness of 6-7. The printed matter is very resistant to organic solvents, acids, alkalis and oils, and has excellent heat resistance, which can withstand 10min at 220 ° C and 30min at 200 ° C. These prints are also resistant to bleaching and disinfection, which makes them widely used in special print areas such as food packaging printing (which requires disinfection resistance) or medical supplies printing (which may require bleaching resistance).

3. Other uses

- In China, 23 purple produced by some manufacturers will appear ink swelling and jelly when used in solvent ink systems such as oil and water intaglio. The permanent violet produced by kneading can avoid such phenomenon. This feature makes the permanent violet produced by kneading method more advantageous in related fields such as intaglio printing, which can ensure the smooth progress of the printing process and improve the quality of printed matter.

- In addition, Permanent Purple RL is also suitable for printing pastes, plastic coloring, office supplies, cultural and educational supplies, watercolor inks. In printing presses, it is able to provide bright, long-lasting colors for fabrics, meeting the color needs of fashion clothing and home textiles. In plastic coloring, it can make plastic products have good color stability, whether it is indoor or outdoor use of plastic products can maintain long-term color. In office supplies and cultural and educational supplies, such as color pens, crayons, etc., it can provide a rich choice of colors and ensure the durability of colors. In watercolor ink, it can provide unique color effects for painting creation and meet the requirements of artists for color expression.