Impact of bleaching actions of bleaching powder and hydrogen peroxide on biopolished denim garments

U radu je ispitan utjecaj pranja s izbjeljivanjem s dva različita sredstva za bijeljenje: praškom za bijeljenje i vodikovim peroksidom na prethodno biopoliranu pamučnu denim tkaninu bojadisanu s indigo bojilom. Odjevni proizvodi od pamučne denim tkanine obojadisani indigo bojilom su prani uz dodatak enzima radi otklanjanja dlakavosti površine, odnosno biopolirani. Nakon toga je jedan dio obrađivan s praškastim sredstvom za bijeljenje u koncentraciji od 2,5 g/L u vremenima od 3 i 5 min na 50 óC, a drugi dio s vodikovim peroksidom u koncentraciji 2,5 g/L u vremenima od 5 i 10 min. Nakon obrada na uzorcima su provedena ispitivanja vlačne čvrstoće, čvrstoće u šavu, površinske mase, postojanosti obojenja na vodu, na kiselinu, lužinu, pranje i habanje. Pranje odjevnih predmeta s izbjeljivanjem provedeno primjenom dvaju sredstva za bijeljenje imalo je velik utjecaj na njihova fizikalna svojstva i postojanosti obojenja u odnosu na neobrađene predmete.This study shows the impact of bio polishing and bleach wash of two different bleaching agent one is bleaching powder and another is hydrogen peroxide on 100 % cotton denim dyed with indigo dye. Garments were washed with enzyme to remove hairiness . biopolished. Then garments were subjected to a bleach concentration with bleaching powder of 2.5 g/L for 3 and 5 minutes at 50 oC temperature and other were bleached with hydrogen peroxide of 2.5 g/L for 5 and 10 minutes. The physical and colour fastness properties were analyzed in before and after washing. The properties that were analyzed include tensile strength, seam strength, fabric weight, and colour fastness to water, acid, alkali, washing and rubbing. Bleach washed garments by two different bleaching agent exhibit a great influence on the physical and colour fastness properties than the unwashed garments

Impact of bleaching actions of bleaching powder and hydrogen peroxide on biopolished denim garments

U radu je ispitan utjecaj pranja s izbjeljivanjem s dva različita sredstva za bijeljenje: praškom za bijeljenje i vodikovim peroksidom na prethodno biopoliranu pamučnu denim tkaninu bojadisanu s indigo bojilom. Odjevni proizvodi od pamučne denim tkanine obojadisani indigo bojilom su prani uz dodatak enzima radi otklanjanja dlakavosti površine, odnosno biopolirani. Nakon toga je jedan dio obrađivan s praškastim sredstvom za bijeljenje u koncentraciji od 2,5 g/L u vremenima od 3 i 5 min na 50 óC, a drugi dio s vodikovim peroksidom u koncentraciji 2,5 g/L u vremenima od 5 i 10 min. Nakon obrada na uzorcima su provedena ispitivanja vlačne čvrstoće, čvrstoće u šavu, površinske mase, postojanosti obojenja na vodu, na kiselinu, lužinu, pranje i habanje. Pranje odjevnih predmeta s izbjeljivanjem provedeno primjenom dvaju sredstva za bijeljenje imalo je velik utjecaj na njihova fizikalna svojstva i postojanosti obojenja u odnosu na neobrađene predmete.This study shows the impact of bio polishing and bleach wash of two different bleaching agent one is bleaching powder and another is hydrogen peroxide on 100 % cotton denim dyed with indigo dye. Garments were washed with enzyme to remove hairiness . biopolished. Then garments were subjected to a bleach concentration with bleaching powder of 2.5 g/L for 3 and 5 minutes at 50 oC temperature and other were bleached with hydrogen peroxide of 2.5 g/L for 5 and 10 minutes. The physical and colour fastness properties were analyzed in before and after washing. The properties that were analyzed include tensile strength, seam strength, fabric weight, and colour fastness to water, acid, alkali, washing and rubbing. Bleach washed garments by two different bleaching agent exhibit a great influence on the physical and colour fastness properties than the unwashed garments

Effect of Hydrogen Peroxide Concentration on 100% Cotton Knit Fabric Bleaching

This paper focuses on the effect of different concentration of hydrogen peroxide (an oxidizing bleaching agent) on 100% single jersey cotton knit fabric. Five different concentrations (25%, 30%, 35%, 40% and 45%) of hydrogen peroxide solution (5% stock solution) were adopted for this experiment. For each individual concentration, bleaching was performed in three different quantities (6gm/L, 8gm/L and 10gm/L) at the same temperature (100˚C) and same time (60 minute) cycle. 5gm samples were taken where 1:10 material and liquor ratio was maintained in each operation. Spectrophotometer (data color 650) was used to test the reflectance of all bleached samples, and their bursting strengths were measured by an Auto burst instrument following ISO 13938-1 method. The effects of hydrogen peroxide concentration on various physical properties such as weight loss, absorbency, GSM, bursting strength, and whiteness was studied to minimize the cost of bleaching process by optimizing the concentration of hydrogen peroxide. As majority of industries have concerned to alineate the production cost with maximum quality assurance which has been obtained through bleaching at 30% concentration