How to test lint-free cloth and lint-free paper? For most of us, the difference between lint-free cloth and lint-free paper may seem superficial — one is cloth and the other is paper. But how do you test them separately? Let's learn about the testing methods. Lint-Free Cloth Testing Methods: 1. The quality of lint-free cloth depends on its thickness and weight. Heavier weight means thicker cloth. Choose different weights for different product cleaning needs. 2. Pull the cloth from both sides, then hold it at an angle toward a light source and examine with a magnifying glass for broken fibers. Broken fibers appear as lint on the surface. The fewer broken fibers, the better the quality. 3. Wipe a fingerprint or smudge off your touchscreen phone with the cloth to see if it can be removed in one pass. 4. Dip in alcohol and wipe your phone screen or glasses to check for residue or lint. 5. In a cleanroom, shake the cloth under light to see if excessive debris falls off. Lint-Free Paper Testing Methods: 1. Check the surface for paper dust. Rub it in your hands to see how much lint comes off. 2. Feel the hardness and thickness by hand. These simple testing methods are for emergency situations when no instruments are available. Professional testing requires specialized equipment.