Devlopment of thickening agent from yam starch (dioscorea hispida dennst)

Abstract

Thickening agent is a substance, when it was using to increase viscosity of an aqueous solution but other properties were not substantially modifying. it had major roles in textile printing process via adjust the print paste viscosity. transfer dye and auxiliaries into fabric. Thickening agent type starch had used in textile printing but it was a troublesome production also high cost. In this research had and feasible study to placement of dry Dioscorea hispida Dennst for textile printing processes such as direct dye and reactive dye printing on cotton woven fabric, acid dye printing on nylon woven fabric, and disperse dye on polyester woven fabric. The results found, dry Dioscorea hispida Dennst successfully applied used as thickening agent, stable time to collected as 3 days. The textile printing quality and viscosity propertied equivalent as the industrial thickener at 10% of weight print paste (owp). The steam fixation applied for direct dye and reactive dye printing at 100c for 10 minutes, and gor flue fixation foracid dye and disperses dye and disperses dye printing at 150c for 5 minutes. The printed quality was good at rubbing fastness, true color appearance. Theresidual paste was removed completely in washing off process.