Color fastness to light is an off line quality assurance system. Generally man wears the fabric and goes outside of the home for doing their job. In day; sun light fall on the fabric surface. So it needs to know how much protection ability have a fabric to sun light. It is determined by an experiment called color fastness to light.

To measure the color fastness a blue scale is used. After completing the test, sample is compared with the blue scale. Here, I have given a light fastness measurement system by Microsol light fastness tester.

Measure the fastness to light with the Microsol light fastness tester: The testing is done step by step. Following step is maintained during measure the color fatness to light.

1. Cut the four pieces of test specimens according to the length & width wise and attached with the specimen holder.
2. Then the holder set in to the Microsol light fastness tester.
3. Then the experiment continued at 72 hours according to the buyer’s requirement.
4. After 72 hours later the specimen taken from the light fastness tester
5. Then the test specimen compare with the Blue scale or computer color matching system (CCMS).

So, we should measure the light fastness.