Abstract
Background/Objectives: The eco-printing method is a dye transfer process that produces natural shapes of leaves and flowers on sheep leather. The research objective aimed at determining the quality of sheep crust leather using the eco-printing method. Methods/Statistical analysis: The research applied the experimental method using sixteen sheets of sheep crust leather. The study employed a completely randomized design. The treatments involved soaking the crust leather in a mordant of alum solution with several soaking times, namely (T0) = 0 hours, (T1) = 12 hours, (T2) = 24 hours, and (T3) = 36 hours; each of the treatments was repeated four times. The research variables included wet rubbing resistance, sweat resistance, washing resistance, tear strength, elongation, and seam strength. The data were analyzed using anova. Findings: The results showed that the soaking time did not significantly affect (P> 0.05) on tear strength, elongation, and seam strength. However, it had a significant effect (p <0.05) on wet rubbing resistance, sweat resistance, andwashing resistance. Therefore, the crust leather soaked in the mordant of Aluminum potassium sulfate for 36 hours before being dyed using the ecoprinting method did not show any decrease in its physical quality. It even showed some improvements of wet rubbing resistance with the value of 4 and 5, sweat resistance with the value of 4, and washing resistance with 4 to 5. Novelty/Applications: Natural dyeing using the eco-printing method can be applied to sheep crust leather to improve the quality of wet rubbing resistance, sweat resistance, and washing resistance. It is also recommended that crust leather be soaked in Aluminum potassium Sulfate’s mordant solution for 36 hours. Keywords: Crust; ecoprinting; leather; quality; sheep
Highlights
Leather products are generally dyed with synthetic materials
It indicates that soaking the crust leather in the mordant of Aluminum potassium sulfate does not change either the physical quality or structure of the crust leather as its structure, especially on the corium part, has already been bound by the tanner
Seam strength can be affected by leather thickness, content and density of collagen protein, adjacent collagen fibers’ angles, and corium thickness
Summary
Leather products are generally dyed with synthetic materials. Synthetic dyes have several benefits, such as giving an attractive appearance to leather products, having various color tones, and easy-to-use. One of the natural dyeing methods used on leather is the eco-printing method. The eco-printing method is used to decorate the leather surface with various shapes and dyes from natural materials[5].
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