00000ctm a22000003a 4500 UP-99796217608617323 Buklod 20081128094625.0 a r |||| u| ta 081128s xx d r |||| u| (iLib)UPD-00064996439 DCHE rda eng LG 993.5 2000 C56 G35 Gallo, Liza Zablan. A pilot study on the utilization of the leaves of the Mayana (Coleus blumei,Benth.) as a potential source of the natural dye for textiles Liza Zablan Gallo ; Maria Monica R. Escano, adviser. 2000. 69 leaves col. ill. Thesis (BS Clothing Technology)--University of the Philippines Diliman. This is a pilot experimental study that aims to determine the feasibility of extracting dye from the mayana leaves and establish that this can be a good source of natural dye for textiles. The study also aims to successfully apply the yielded dye to natural fibers such as cotton, pina and silk and determine if the extracted dye has good affinity, lightfastness and washfastness. The mayana plant is one of the abundant plants growing here in the Philippines. The Philippines has abundant resource of natural dyes from its various population of flora. The production of these natural dyes is a limited field of study because of its tedious extraction process thus importation of synthetic dyes is favored by the textile industry. However, this should not totally discourage potential researchers as the discovery of natural dyes and its consequent development of a cheap manufacturing process could only be advantageous to us. This is an experimental study in which the variables in consideration were specific mordants at different concentrations and concentration of the dye extracts. The time of application of the dye was constant at 1 hour as well as the temperature of the extract, which was kept at 100°C. This research used the dyeing process defined by the Philippine Textile Research Institute (PTRI) in extracting natural dyes. Water was used as solvent with a liquor ratio of 1:30. Two types of mordanting agents were used: copper sulfate and alum. The variables of the experiment are mordant concentration and dye concentration. Mordant concentrations were at 1%, 2% and 4%. Dye concentrations were 100%, 200% and 400%. A matrix of these variables were used for the experiment. Results of the experiments show that the color obtained from the mayana leaves is olive green. The best combination was at 4% copper sulfate mordant applied at 400% dye extract. Copper sulfate was a better mordant than alum. The dye showed good affinity to natural fibers particularly on silk. Like all natural dyes, the dye exhibited poor washfastness and lightfastness. On the other hand, it has excellent staining qualities. Plant dyes. Dyes and dyeing. Escano, Maria Monica R. FI Thesis UPD DCHE LG 993.5 2000 C56 G35 Thesis