Reflectance model for filament yarn composed of different color monofilaments

摘要

Reflected light is one of the important components that determines the color of an object. In order to predict the reflectance of the filament yarn, a model was proposed considering the reflectance, transmittance and arrangement of the monofilaments mixed in the filament. Since the fineness of a single monofilament was too small to cover the test hole of the Datacolor spectrophotometer, films with an average thickness of 0.022 mm were used to replace the monofilaments. A total of 120 samples with different layers composed of any two of four kinds of color films were designed to verify the model. The result shows that most of the color differences between the reflectances tested and calculated were below 0.8 Color Measurement Committee (2:1) units. Further, a Pearson's correlation analysis was performed to find the significant effects on the prediction results. It was found that Delta L* and Delta b* varied with the a* of the samples; Delta a* varied with the L*, a* and b* of the samples. In order to improve the accuracy of the model, the correction factors were added to the reflection and transmittance of the film. The average color difference of four kinds of physical filaments was 2.48 CMC (2:1) units. The research here are of benefit to design filament product with desired color.

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