Yiren Liu, Xiaoxia Wan, Jingxiao Mou, Taichuan Shi. Research on Prediction of Mixed Spectra of Offset Printing Spot Color Ink[J]. Laser & Optoelectronics Progress, 2022, 59(7): 0733002
- Laser & Optoelectronics Progress
- Vol. 59, Issue 7, 0733002 (2022)
Fig. 1. Actual spectrum and mixed spectrum of offset printing ink predicted by K-M theoretical model
Fig. 2. Relationship between transmission value and spectral reflectance under different models
Fig. 3. Comparison of K/S data with different concentration for Blue1 primary ink. (a) Real K/S; (b) K/S by piecewise linear interpolation; (c) K/S by traditional normalization method
Fig. 4. Comparison of K/S data with different concentration for 550 nm Magenta ink
Fig. 5. Three gradient spectrum curves of Red2 primary ink. (a) Real spectra; (b) deduced spectra by piecewise linear interpolation; (c) deduced spectra by traditional normalization method
Fig. 6. Determination of m values for 2-, 3- and 4-primary ink blends respectively
Fig. 7. Comparison of predicted spectra by two methods and actual sample spectra. (a) Sample 1; (b) sample 2; (c) sample 3;(d) sample 4; (e) sample 5; (f) sample 6; (g) sample 7; (h) sample 8; (i) sample 9
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Table 1. Mass percentage of each base color ink in the target color
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Table 2. Comparison of actual spectrum of the base ink database and deduced spectra of the methods (K-M and Proposed)
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Table 3. Comparison of the accuracy of two ink-based mixed spectrum prediction models
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