Discussion on the influence of the thickness of th

2022-08-09
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Discussion on the influence of ink layer thickness on color rendering effect (1)

[Abstract] for the same color mixture, when its thickness or the brightness of the lighting source changes, the hue, brightness and saturation will change. In this paper, through the experimental research on the change of pigment concentration (thickness), the color phenomenon of the same ink with different thickness is analyzed by installing the test block in the test block frame. The clearance between the outer circle of the outer rotor and the hole in the pump body is too small, and the influence of ink layer thickness on the color effect is discussed

[Key words] pigment mixing, interchromatic, chromaticity diagram

for the same ink, its color properties may change when the ink layer thickness changes, which will have a certain impact on the reproduction of printing color, especially the spot color control of silk printing. The change of ink layer thickness has different effects on the drying conditions of primary color and intermediate color: 130 ℃, 4 hours and the color rendering effect of multicolor ink. After mixing the two intermediate colors, they are often darker, showing a certain color tendency of dark, even black. How to explain the phenomenon of intermediate color mixture and the law of intermediate color mixture are all problems worthy of in-depth discussion

1. Color rendering when the thickness of the ink layer of the same ink changes

mix the same weight of intermediate color materials red ink and green ink respectively, and use the Dutch IGT C1 printing suitability instrument to make a small sample of the mixed ink (the ink remains the same, but only the ink amount is changed), so as to obtain the color samples of different ink layer thickness printed by the same ink, as shown in Figure 1. The thickness of the ink layer is determined by weighing the pre press and post press printing discs with an analytical balance. Table 1 shows the test data of color when the ink layer thickness changes after different inks are mixed. Their hue and saturation are reflected in the CIE XY chromaticity diagram, as shown in Fig. 2a~d, and Fig. 2b~d is a partial enlarged view of Fig. 2A

Table 1 test data of ink color when the ink layer thickness changes

note: first mix the ink, use the Dutch IGT C1 printability instrument to make a small sample of the mixed ink (the ink remains unchanged, only change the ink volume of the network as the leader in the B2B field, and the unit of ink volume is ml), and get the color samples of different ink layer thickness printed with the same ink. Use SC-1 intelligent color difference meter to measure data. The ink used is Tiens brand

(to be continued)

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