Determination of suitable wavelengths in dye concentration estimation by spectral analysis of K/S's scalability. (8th October 2021)

• Record Type: Journal Article
• Authors: Safi, Mahdi; Ameri, Farhad; Ansari, Keivan
• Is Part Of: Physica scripta. Volume 96:Number 12(2021)
• Publication Date: 2021-10-08
• Subjects: kubelka-munk function -- dye concentration -- estimation -- spectral analysis -- scalability -- disperse dye; Physics -- Periodicals; 530.05
• DOI: 10.1088/1402-4896/ac2b4a
• Languages: English
• ISSNs: 0031-8949

Abstract

Abstract: K/S and reflectance graphs are essential tools in characterizing the dyeing behavior. In textile coloration, estimating the dye concentration is poor using the Kubelka-Munk model due to its low scalability and deviation of the reflectance function from linearity after low dye concentrations, particularly in the wavelengths where the gradient of K/S against dye concentration is noticeable. This paper focused on extending the validity of the Kubelka-Munk function, which originates from the linearity of reflectance function against higher dye concentration. A data set of dyed polyester specimens with three disperse dyes in a dye concentration range was prepared. At the present work, K/S was analyzed by describing the scalability property, and the suitable wavelengths in the visible spectrum where K/S benefits from minor deviation from linearity were also discussed. It was observed that the K/S function is not always scalable and deviates in λ max after a specific dye concentration for K/S > 17. Accordingly, the wavelengths other than λ max were found that could be as important as λ max . For the K/S values > 25, no practical region was achieved.