The hottest pearlescent pigment has infinite prosp

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The prospect of pearlescent pigments is infinite

for many years, people have admired the faint and attractive luster of pearls. If it can be seen everywhere in life, it would be a wonderful thing. However, it was not until the middle of the 20th century that this special pigment that can emit pearl luster was applied to printing. This is the product called "mica titanium pearlescent pigment", commonly known as pearlescent pigment. Its appearance makes the decorative effect of 2) screwing round steel brushes to drill pipes and electric drills into cleaning tools richer. At present, with the continuous development of the printing industry, especially the increasing market demand for high-quality packaging, pearlescent printing is more and more widely used

pearlescent pigment shows great power

what technology is used in this pearlescent ink, which continues to attract the attention of the printing industry and is gradually selling well in the market? In fact, it is very simple, that is, pearl powder is mixed with solvent-based or water-based ink, which is evenly dispersed in the translucent ink through the micron chip layer. Under the refraction and reflection of light, it reproduces the elegant luster and color of natural pearls, shells, butterflies, fish and metals

although the technical principle is very simple, this pearlescent pigment still shows great power in practical printing applications

1. Good stability

as pearlescent pigments are inorganic compounds with relatively stable chemical properties, they will not be denatured due to oxidation and acid-base effects, and there are no special requirements in storage, transportation and use. At the same time, pearlescent pigments are not toxic and corrosive, and can be applied to all printing substrates, including food packaging, and will not be harmful to human body

2. Good decoration

it is believed that printing enterprises that have used pearlescent pigments will have a deep memory of their extraordinary decorative effects on printed products. Because the pearlescent pigment and ink are mixed flexibly, the pearlescent effect of different levels and colors can be achieved through different color matching methods and the concentration of pearlescent pigment in the ink, so as to improve the beauty of the printed matter

3. Good adaptability

from a technical point of view, in addition to offset printing with high particle size requirements, the pearlescent effect can be achieved by any current printing method, even glazing (oil). In terms of substrate, although there are no specific requirements, in order to highlight the good pearlescent effect, the substrate with smooth and flat surface is more suitable. In the printing operation, except for controlling the printing and drying speed, other operations are the same as usual, so there are no operational difficulties

4. Good economy

in general, the cost of pearlescent pigment is not expensive, and the ink mixed with it can be ordinary. In this way, the same exquisite decorative effect can be achieved. Using pearlescent pigments is obviously more cost-effective than selecting substrates with special effects

but this does not mean that the pearlescent pigment is perfect. Because the pearlescent powder in the pearlescent pigment is actually made of titanium dioxide (or other metal oxides) coated mica. According to the current process, its particles are relatively large, so it is easy to form precipitation, making the ink lighter and lighter, resulting in color difference. In operation, there are certain requirements for ink viscosity, inking and drying speed

pearlescent pigments are suitable for various printing methods

such pearlescent pigments with excellent performance are not "Wangxie tangqianyan". For various printing methods, it can be said that everyone will come. However, it is worth noting that pearlescent pigments also have targeted requirements for different printing methods

1. pearlescent offset printing

although offset plate making is fast and low-cost, it is the goal of many printing manufacturers to achieve pearlescent offset printing, compared with the thin ink layer and long ink path of offset printing, the pearlescent pigment with large particles is very difficult to transfer in the process. Therefore, in order to realize pearlescent offset printing, we must choose pearlescent pigments with smaller particle size and shorten the ink path as much as possible

2. Pearlescent printing

it can be said that silk printing is very suitable for this kind of pearlescent pigment with large particle size, and it can also form more special effects. However, the slow ink drying speed of silk printing will affect the final effect of pearlescent ink on the substrate

the pearlescent printing business of Zhejiang Meinong silk printing Co., Ltd. has accounted for half of the total business volume, while the pearlescent printing accounts for 70%. In particular, the pearlescent printing can produce the effect of "different angles and different colors", which makes the "Lushan" cigarette label of Jiangxi Nanchang cigarette factory and the special "general" cigarette label of Shandong Jinan cigarette factory shine

3. Pearlescent gravure

ink car owners can get up to 11000 yuan of subsidies and awards. Thick gravure printing is certainly very suitable for the application of pearlescent pigments. In fact, it is also the most widely used field of pearlescent pigments in actual production. However, due to the high cost of gravure printing itself, pearlescent printing cannot be applied in large-scale production. Henan Golden Mango Printing Co., Ltd. uses gravure printing to decorate the cigarette label with pearlescent effect. The cigarette label box printed with pearlescent ink comprehensively improves the grade and ornamental of the product and increases the added value of the product. It was after the company introduced pearl gravure printing that it attracted a lot of business

4. Pearlescent flexographic printing

using pearlescent pigments with different color sequences or different particle sizes, we can achieve rich pearlescent effects in flexographic printing. In fact, flexographic printing is also the emerging pearlescent printing method at present, but it is also restricted by the high prices of flexographic plates and rollers

at drupa 2004, we were delighted to see that some printing machinery manufacturers have introduced glazing equipment connected to the offset press, using flexographic printing and laser ceramic roller ink transfer, which enhances the transmissibility of pearlescent pigments, and also uses offset printing to improve production efficiency. We believe that with the continuous development of technology, pearlescent printing will be able to solve the problems of production efficiency, printing effect Contradiction between production requirements and manufacturing costs

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purchase of pearlescent pigments

when purchasing pearlescent pigments, you must first thoroughly understand your own production process

1. considering the particle size of pearlescent pigments

as has been analyzed above, it is best to use silk printing for pearlescent pigments with large particle size, while the particles should strive to improve the surface roughness, weight and coupling degree of the workpiece, and gravure printing can be used for pearlescent pigments with small particle size. In the field of packaging, in order to highlight the graininess of pearlescent effect, many printing manufacturers choose pearlescent printing. Because pearlescent pigment particles are large and many, when light shines on its surface, it will reflect a lot, strengthen the brightness of color, and produce a "shiny" effect

2. Considering the thickness of the substrate

in the silk printing and gravure printing with small particle pearlescent pigment to make and improve the surface finish and hardness, in order to facilitate the transfer, it is necessary to apply greater pressure on the surface of the substrate, so if the surface compression resistance of the substrate is insufficient, it is easy to cause the deformation or fracture of the substrate

3. Considering the printing cost comprehensively

it does not mean that the pearlescent pigment is cheap, and the pearlescent printing cost is low. As mentioned above, sometimes in order to avoid pearlescent pigment precipitation in the printing process, it is necessary to speed up the drying speed of the ink. The best solution is to use UV printing, but once UV ink is used, the overall cost will increase. In addition, the costs of flexographic printing and gravure printing are quite high, but at the same time, this is also the most suitable printing method for pearlescent effect, so it should be considered carefully when purchasing pearlescent pigments

source: business information of printing materials in China

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