Manual friction fastness tester is the most commonly used instrument for the textile industry to detect the color fastness of the fabric to dry and wet rubbing. The test procedures for dry rubbing and wet rubbing are as follow： Dry rubbing: Use the holding clamp to mount the specimen on the baseboard of the Crockmeter . The long direction of the specimen is parallel to the track of rubbing. Ensure the specimen lays flat on the baseboard. Two tests are performed, one along the direction of the warp/length and the other of the weft/width. Mount a dry rubbing cloth flat over the end of the peg on the Crockmeter and hold it taut by means of the spring clip provided. Ensure that the rubbing cloth is not placed on the diagonal in the direction that the peg is moving. Rest the finger on the specimen, ensuring that the spring clip is not in contact with the test sp...