Comparative Analysis of Manual Fading and Laser Fading Process on Denim Fabric

Abstract

Fading is renowned process to develop fabric outer appearance. Difference types of fading process are applied on denim fabric to modify fabric outer surface. Laser fading, Hand sand brushing and Potassium permanganate (P.P) spraying etc are applied on denim for fading. In this research work, the properties of Modern (Laser) and conventional fading process (Hand sand brushing, PP spraying) were analyzed on denim fabric. A particular design was produced by laser fading at 130 μs. After that same design is produced by hand sand brushing with the emery paper (220, 320 & 400 number papers) and PP spraying with the Potassium permanganate spray. Reflective spectrophotometer was used to determine L*, a*, b* coordinates, the colour change (ΔE values), Yellowness Index (according to ASTM D 1925) and colour efficiency value (K/S). Physical, Mechanical and other aesthetic properties are also tested and the finding results are also compared with untreated (Raw denim) samples. After testing the sample it is found that rubbing fastness is remain unchanged for PP spraying in compare with raw denim but slight changed for Hand sand Brushing and PP spraying. Durability of untreated, hand sand treated, laser treated and PP sprayed fabrics were evaluated in terms of pilling and fastness toward washing and Lighting, using the gray and blue scale (ISO 105-A02-1987) according to ISO standard recommendations and compared with untreated one. Tensile and tearing strength have decreased in compare with raw sample. The most significant decrease of tensile and tearing strength is occurred after hand sand brushed fading.