UTILIZATION OF ONION WASTE AS ANTI-UV TEXTILE DYE PASTE USING SCREEN PRINTING TECHNIQUES FOR SPORTSWEAR PRODUCTS

• Main Author: Raida Putri Jafari, Imara
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/73509
• Institution: Institut Teknologi Bandung

The issue of food waste is a crucial issue in Indonesia, because Indonesia is the second largest producer of food waste in the world. Among the many food wastes horticulture sector is the most inefficient sector. Shallots are one of the most abundant harvest in Indonesia with a total harvest of around 1,815,445 tonnes per year. Based on data taken at Nganjuk’s shallot warehouse, the waste generated can reach dozens of quintals per day. This is a big disadvantage because shallots contain flavonoids, especially quarcetin, which have advantages as therapeutic agents with such as anti-UV radiation properties. The use of shallot waste is then interesting to develops as an aesthetic and also a functional enhancer in textiles, especially the use of natural ingredients can help reduce the bad effects of textile industrial waste. The research method used in this journal is an experimental method where the research focus lies on the procedure for making pasta and applying the results of utilizing shallot waste as screen printing paste. Some of the aspects examined in this paper are the extraction procedure, the use of extraction solvents, the use of biobased thickeners, and also the use of mordant in paste compositions. The shallot waste paste that has been made is then applied using the conventional screen printing method (flat-bed screen printing). The screen printing results are then applied as a sportswear product seeing the need for an anti-UV properties. The results of the study then showed that the use of alcohol solvents can strengthen the resulting colors, the use of alginate thickener is the most ideal thickener to use, and the application of dye paste can only be applied to fabrics with natural materials such as cotton combed and also cotton bamboo. The results of screen printing of shallot waste dye paste were then tested for resistance to UV radiation with UV-Vis Spectrophotometry tool and showed that the UPF (UV protective factor) value reached 35-123 which gave a protection index with very good to excellent protection.