A range of chemicals as dyes, finishes, and auxiliaries are used to enhance the performance of the desired fabric. However, these chemical treatments need to be assessed on a regular basis to provide the maximum benefit. Using doses of chemicals below and above the optimum levels, and using non-optimum application conditions, can lead to the rejection of the fabric and wastage of the expensive chemicals. The selection of the appropriate testing methods and conditions is as important as the successful application of the required dyes and chemicals to the textile. A range of test methods has been developed for the testing of a single performance. However, it is critical to use a testing method that correlates with the actual conditions and that is less costly, easily adaptable, reproducible, precise, and accurate. There are numerous test methods for dyed and finished fabric; however, only the most frequently used methods are discussed below. The most common 190standard test methods in the textile dyed and finished area are those of the International Organization for Standardization (ISO, 2016), the British Standard (BS, 2016), and the American Association of Textile Chemist and Colorist (AATCC, 2016).