Study On Test Standard For Colorfastness To Light And Perspiration

Nowadays, more and more people participate into outdoor activities. While exposing to open air for exercise, the color of the garment fades when the fabric wetted by perspiration. The fabric made entirely from or a combination of cotton is extremely sensitive to the combination action of light and perspiration.Wherefore, a proper test standard is one of the necessary conditions to ensure the fabric quality.Different testing methods for the color fastness to light and perspiration for cotton dyed fabrics are compared, including ISO105B07, AATCC, ATTS and DS070. In order to ensure the reliability and easy to operate, the composition of artificial perspiration, exposure conditions as well as the rating method are reviewed.First of all, an optimizing on this test method is brought to the artificial perspiration which is simplified in respecting the real attack of the perspiration. By removing the D-Pantothenate of Sodium from the artificial perspiration, the test becomes easier to prepare.After verification, a universal condition is applied, including the light intensity, time, and temperature. This new conditionAt last, the rating system in form of gray scale degree is also changed into two indices including both dHcmc value and shade change in gray scale value. The Cochran test and Grubbs test are also introduced to verify the repeatability and reproducibility of this new test method.