Precautions for the use of the hottest pearl anti-

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Precautions for the use of Pearl anti-counterfeiting inks

pearl anti-counterfeiting inks are various types of special inks made of synthetic inorganic crystal materials, natural pearl mica powder and other color pigment beads that can emit special color light. We should keep up with our pace. Light pigments and corresponding binders according to the information provided by ducere. It can make the printed matter have a particularly beautiful luster. Before the printing process, the following matters should be paid attention to:

1 Characteristics of pearlescent anti-counterfeiting ink

(1) pigment vulnerability: pearlescent pigment is made of titanium dioxide (or other metal oxides) coated mica, which is in a sheet-like structure, very fragile and easy to be damaged

(2) large particle size of pigment: the commonly used mica titanium pearlescent pigment has a size of 25 m and a thickness of 0.2 ~ 0.5 m

(3) transparency has an impact on the pearlescent effect: the pearlescent effect of pearlescent anti-counterfeiting ink mainly comes from the refraction and interference of incident light. The advantage of the computer is that it can analyze the data in detail. If the transparency of the ink layer is low, the originally abundant light will be absorbed and lost. Therefore, when selecting ink binder or varnish, you should choose the material with the best transparency

2. Precautions for use

(1) it is suitable for the printing of field color blocks

due to the large particle size of pearlescent anti-counterfeiting ink pigment, the UV fluorescent ink particles carried on the dots are less. For example, only one pigment particle can be carried on a 2% dot, which is difficult to ensure the reproduction of small dots. Therefore, pearlescent anti-counterfeiting ink is not suitable for printing eye-catching products, and it is best used for the printing of field color blocks

(2) back sticky dirt phenomenon

when printing pearlescent anti-counterfeiting ink, it is particularly prone to back sticky dirt phenomenon. This is mainly due to the large pearlescent pigment particles, and in order to increase its fluidity, a large number of binders are added, which makes the special ink thinner and the drying time longer. The following measures can be taken to control and solve the problem: first, strictly control the temperature and humidity of the workshop, with the temperature controlled at about 20 ℃ and the humidity controlled at about 55%. The second is to control the amount of water as much as possible while ensuring that the increase of temperature will increase the water ink balance at this rate. Third, spray an appropriate amount of powder on the receiving section, but pay attention not to spray too much powder, otherwise it will affect the gloss of Pearl anti-counterfeiting ink. In addition, it is better not to use dry oil to improve the drying speed of pearlescent anti-counterfeiting ink. If dry oil must be used, white dry oil must be used. Red dry oil will affect the appearance of pearlescent effect, and the amount of dry oil should not exceed 2%

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