What is color fastness to rubbing?
Rub color fastness refers to the degree of color change in colored textile material caused by a specific type of rubbing with the small white cloth on a specific device.
The color fastness of Textiles can be divided into two types: dry and wet abrasion resistance. Wet Abrasion Resistance is tested when the fabric is wet. In general, wet fabrics tend to have poorer rub fastness. This is because the dye hydrolyzes easily and stains the adjacent fabric more easily. However, this is not always the case. For example, printed fabrics can actually perform better when wet than when dry. This is because water stains cover the printed surface, but smoother reduces the friction coefficient of the surface.
What does crocking mean for fabrics?
In the process of making, wearing and storing the paint des fabric changes color due to friction or the color is transferred to the adjacent fabric. what is called color fastnessfriction. Wearing clothes with poor color fastness to rubbing not only stains other light-colored clothes and affect their appearance, but also that the surface dye is easy to transfer to the skin due to the friction of human movement. After it is absorbed by the skin, the skin will have an allergic reaction to the skin or cause certain harm to the human body.
Therefore, when buying clothes, we should not only pay attention to the beautiful color, but also to the intrinsic color respect authenticity. A certain knowledge of textile testing helps people buy clothes that are uniform inside and out, which is of great benefit in improving the quality of life.
The color fastness to rubbing is one of the test items for the color fastness ofTextiles, which is also one of the most common test objects in the textile trade process. The relevant standards of major countries and regions in the world, such as China, Europe, the United States, Japan and other countries or regions, have established clear requirements for it. Starting in the next section, I\'ll show you how to identify garments with poor color fastness to rubbing.
What is rubbing cloth?
Friction cloth with friction color fastness testing machine, dry/wet of The standard requirements are established by specifying a specified number of back and forth rubs with the AATCC -Standard gray card for fading colors and the AATCC standard gray card with mottled colors and the AATCC standard color comparison chart set with nine grades to evaluate their fading (discoloration) and the degree of discoloration, thus evaluating the ability to simulate the cloth may come into contact with other substances when the color becomes solid. This standard friction cloth is widely used in Japanese Standards (JIS), American Standards, European Standards and Chinese National Standards.
This test method is used to measure the degree of color transfer of colored textile material on rubbed white fabric to be determined by friction. This standard applies to all textile materials, whether yarn or fabric, whether dyed or printed or otherwise colored.
What is the size of the crocking cloth?
The table below shows example requirements for each standard
Crockmeter (Rubber Resistance Tester) Y571M Manual Crockmeter (Rubber Resistance Tester)
Application:
The manual Crockmeter Y571M (rubbing fastness tester) is used to determine the color fastness of textiles (except pile fabrics) to dry or wet dirt. It provides a reciprocating rubbing motion that simulates the movement of a human finger and forearm. Covered with a cotton test cloth, the 16 mm diameter grinding finger moves back and forth on the textile sample with a downward force of 9 Newtons.
Key specification:
Y571D Electronic Crockmeter/Rubbing Fastness Tester
Application :
Y571D Electronic Crockmeter/Rub Fastness Tester is designed to determine the color fastness of fabrics to dry or wet rubbing and comes standard with a crocking finger with a downward force of 9 Newtons and mounting capability -Crocking fabrics fitted. An attached acrylic S The sample holderensures rapid sample assembly and repeatability of results. It is electronically driven to minimize operator variability.
Feature:
Motor driven to minimize operator error and improve efficiency
With The preset LED digital display counter, the test times can be set arbitrarily. The sample clamp ensures quick sample mounting and prevents slipping. Two different sizes of reaming heads can be used to meet different standards. The rubbing platform is treated with electroplating chrome to prevent rusting. The roller of the small press is made of brass and is durable.
Key specification:
Application
The Y571A Rotary Vertical Crockmeter is used to determine the color fastness of fabrics to abrasion and staining on other materials where the separation of areas is less than is possible to compare with the AATCC TM8 and ISO 105-X12 to test the device described. A test specimen is held at The base of the rotating vertical crockmeter is rubbed with a standard rubbing cloth under controlled conditions.
Feature:
Stainless steel structure, durable and easy to clean ;Turn the handle to make the reciprocating rotary motion of the vertical weight barto drive The handle can only be rotated in one direction; Compact and space-saving.
Key specification:
Y571A-II Electric ATCC Rotary Crockmeter
Application:
Y571A-II Electric ATCCRotation Crockmeter for determining the color fastness of textiles to dry and wet rubbing, especially for printing materials. Puts 1134g of pressure on a 16mm fingerand rotates 1.125 revolutions clockwise and then counterclockwise. The finger is electrically powered.
Feature:
Powered by electricity, labor-saving; Special aluminum plate, beautiful and decent; Metal buttons, durable.
Key specification:
Y571J Color Fastness Tester (Gakushin)
Application:
The Y571J Color Fastness Tester (Gakushin) is a rub tester with six stations used to determine the color fastness of textiles Rubbing. It consists of a sample table, reaming head, loading arm, horizontal reciprocating device, etc. Assemblen Place samples on the sample table and undyed cotton clothing for rubbing on the rubbing head with grinding clamps. After the reciprocating rubbing motion for a certain number of times under certain conditions, the change in color of the species or coloring of the undyed cotton cloth can be judged.
Feature:
Each workstation is equipped with a removable reaming head and clamp set to accommodate up to six types to test at the same time. With walking speed control. A protective cover protects the operator. hands from injury; Simple operation, equipped with preset function, the machine will stop automatically when the preset number is exceeded.
Key specification:
How to test color fastness to rubbing?
Prepare the sample according to the standard you need, and then adjust the parameters with the instrument you have. After the experiment, use the color chart to evaluate the standard rubbing cloth. More detailed steps are here.
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