Color Fastness to Perspiration
ISO 105 E04 and AATCC 15 are the most common standards for assessing whether perspiration affects color fastness. It’s particularly relevant for fabric used to make sportswear.
Again a multi-fiber fabric is used along with the fabric being tested. AATCC 15 tests color fastness in the presence of acidic perspiration. ISO 105 E04 goes one step further and tests for color fastness in the presence of both acidic and alkaline perspiration.
Human sweat is typically acidic. But it can become alkaline in higher temperatures or when bacteria are present. So the ISO standard is the more thorough in this case.
How colorfastness to perspiration is tested: