Study on the color levelness of silk fabric dyed with vegetable dyes

Abstract

At present, customers are more conscious about the quality of clothing items. As a result, it becomes more challenging for the manufacturers to maintain the consistent dyeing quality. Unlevelness is generally unaccepted in commercial dyeing, except some cases such as stone-washed, acid-washed or pigment-dyed textiles. The aim of the study was to evaluate the color levelness quality of fabric dyed with vegetable dyes. For this purpose, dyeing was carried out on silk fabric with the aqueous extracts of mango, guava and henna leaves. Then the levelness of colored fabric was evaluated by spectrophotometric measurements in terms of color difference, ∆E value. It was concluded that unmordanted dyed samples have better color levelness quality than the mordanted ones. The unmordanted samples dyed with mango and guava leaves extracts showed excellent levelness quality while the unmordanted ones dyed with henna leaves extracts showed good levelness quality. On the other hand, the mordanted dyed samples showed good leveling quality for the three vegetable dyes except ferrous sulphate mordanted sample dyed with henna leaves extract. Again, among the mardanted samples the levelness quality was comparatively better in case of alum mordanted dyed samples and the average ∆E value was increased gradually when moved from alum to tin and finally to ferrous sulphate.

Coloration, UV Protective, and Antioxidant Finishing of Wool Fabric Via Natural Dye Extracts: Cleaner Production of Bioactive Textiles

“…ferrous sulfate produced pronounced effects on color depth for T. arjuna , A. nilotica , and A. vasica dyed wool fabrics. The enhanced color strength values in all mordanted samples can be explained on the basis of increased interactions between wool, mordant, and dye molecules via coordination complexation ability (chelate complex formation) (Figure ).…”

“…Pre-mordanting with ferrous sulfate has modified/altered the spectral transmittance data as mordanted samples show lower UPF values in A. nilotica and A. vasica dyed wool fabric. This is due to the increased interaction between wool, mordant and dye components, resulting in the loss of free phenolic groups, hence reducing the rate of quenching [21,35]. Table 4 presents a comparative UV transmittance values of different natural dyes in response to the transmittances (%) recorded in the present study [39][40][41][42].…”

Promising Effect of Metallic Mordants on Colorimetric Physiognomy of Dyed Cotton Fabric Employing Banana (Musa Sapientum) Agricultural Waste

“…The degree of levelness was measured according to Uddin, Mohammad Gias (2015) [20]. Briefly, color difference, ΔE value was measured by equation 1.…”

“…The K/S values were determined at the maximum absorption wavelength ( max =360) at which reflectance value is lowest.2.2.9. Determination of Brightness IndexBrightness index was measured as per the standard(ISO-2470(ISO- -1977 [20] method using equation 3.Brightness index =Refletance value of the substrate at 360 nm Reflectance value of white diffuser or white tile at 360 nm(3)…”

Computer Color Matching and Levelness of PEG-Based Reverse Micellar Decamethyl cyclopentasiloxane (D5) Solvent-Assisted Reactive Dyeing on Cotton Fiber

“…Therefore, the color performance during use is of great importance in terms of the expectations of the customers [30]. Color levelness is a description of the uniformity of the color shade in different places of the fabric [31,32]. The appearance of color uniformity, in terms of levelness parameters in dyed fabrics and/or a union shade in dyed fabrics of more than one fiber type, is one of the main concerns in textile manufacturing industries [33].…”