Читать книгу Sustainable Practices in the Textile Industry - Группа авторов - Страница 36

Color strength or K/S value is the most important parameter to test the quality check of a sample in terms of depth of the color dyed on fabric. Strength of any colorant is related to absorption property. Reflectance (%) of the dyed fabric samples can be measured by using a spectrophotometer. The Kubelka–Munk theory gives the following relation between reflectance and absorbance:

where R is the reflectance, K is absorbance and S is the scattering.

The above equation is used for detection of color strength. Color strength of the dyed fabric influenced by the increase of reflectance value. When shade percent increases, reflectance percent & color strength (K/S) decreases. If shade percent is more but color depth is less than quality of textile does matter a lot for customers and selling manufacturers as well. Color strength of a textile is a quality control assurance system. It is also important to know about the color combination by which color is produced. So, it makes the necessity of color strength testing in textile industries. Color strength or K/S value were carried out by different scientists for natural dyed fabrics [50, 51, 101].