Utilización de diferentes niveles de blanqueante óptico en la fabricación de cuero blanco para calzado deportivo

Abstract

At tanning lab of Animal Sciences Faculty of ESPOCH, different level of optical whitener in the white leather finishing process for sport shoes was evaluated. In this study, 24 pieces of goat leather were classified in 3 treatments with 8 repetitions for each one. Completely randomized design was used. The results show that collagen fibers combine with the optical whitener intensify the white color of leather used for manufacture sport shoes. In addition, on in the leather surface there aren't oxidation and yellowing. The highest physical strength of the white leather was obtained when applied, in the wet finish, 3,5% of optical whitener; since the highest tension is obtained (4417,27 N/cm²); elongation percentage (93,44%), and dry rub resistance (150 cycles), furthermore this treatment reach the quality requirements of Spanish standards. When 3,5% of optical whitener was used, the fullness ratings (4,88 points) and color intensity (4,75 points) show the best results. While, the highest score for softness was recorded when using 2,5 % of optical whitener. To assess the income and production cost of goat leather manufacture, the highest rated benefic/cost was obteined when 3,5% of optical whitener was used, in the wet finished of the goat leather the cost benefit ratio was $ 1,34, so for every dollar invested is expected 34% of profitability