Application
Rotary Vertical Crockmeter, to determine the colour fastness of textiles to dry or wet rubbing particularly for printer fabrics. Rotary crockmeter applies 1134 grams of pressure on a 16mm finger and rotate 1.125 turns clockwise then anti-clockwise.
The operating handle is however turned in one direction only.
Included Accessories
Standards
AATCC 116, ISO 105 X16
Weight
11 Kg
Dimensions
250x150x250 mm(LxWxH)
This method is used to evaluate the degree of color transfer from the surface of colored textiles to other surfaces due to friction. It suitable for colored yarns and fabrics made of various fibers, including dyed, printed and other colored yarns and fabrics. Especially suitable for printing textiles whose area is too small to be tested by standard method AATCC 8.
This test method uses friction cloth, including dry friction cloth, water wetted friction cloth or friction cloth wetted with other liquids permitted by this method.
The specimen is fixed on the base of the rotating vertical friction instrument and friction with the standard friction cloth under specified conditions. To evaluate the degree of color transfer to a standard friction cloth by comparing it with a stained gray card or an AATCC color card.
The specimen may be of various structures and be tailored to a certain area according to the rule. Before testing, the sample and friction white cloth should be moistened according to the method of textile humidification. Place each sample or frictional white cloth at least 4H under atmospheric conditions of 21℃±1℃ and relative humidity of 65%±2%.
1 Place the standard friction cloth at the end of the vertical bar and fix it with a spring clip.
2 Fix the specimen on the base of the instrument, it fixed to the position where the vertical rod is in contact with the base so that the friction cloth at the end of the friction rod can contact the sample. Put the weight of the friction instrument on the vertical pole, and apply a certain downward pressure to the friction head.
3 Fix the specimen on the base with the left hand and rotate the crank with the right hand to make the sample rub with the standard friction cloth for a certain number of times. Then take out the sample and friction cloth and evaluate it.
If the friction white cloth is non-circular due to the uneven color of the stained white cloth, it is indicated that the friction head may need to re-repair the surface. If an elongated pattern of ghost is generated, it is shown that the spiral metal clip may be loose. If there is a rubbing mark on the edge of the specimen, it is indicated that the spiral metal clip is installed down and the position is not high enough.
If the friction area of the friction sandpaper on the friction base is found to be smooth compared with the adjacent area by hand or if the sample is obviously sliding, the friction sandpaper should be replaced in time.
