FYI Tester Instrument

  What is meant by light fastness Color fastness to light is the ability of a stain to retain its original color when exposed to sunlight. Due to the wave-particle biphasism of sunlight in nature, the sunlight that transmits energy in the form of photon has a strong impact on the molecular structure of dyes. According to the general regulations, the light fastness of the determination of the sunlight as the standard. In the laboratory, for easy control, artificial light sources are generally used and corrected if necessary. The most common artificial light source is xenon, or charcoal arc lamps. Under the irradiation of light, the dye absorbs light energy, its energy level increases, its molecules are in an active state, and the hair color system of the dye molecules changes or is destroyed, resulting in the discoloration or fading of the dye. Sun fading is a complicated photochemical process. It is related to the structure of dye, dyeing concentration, fiber type and external conditio

Color fastness to rubbing refers to the degree of color fading of dyed fabrics after rubbing, which is divided into color fastness to dry rubbing and color fastness to wet rubbing. It’s also known as color fastnesss to crocking. The test method for the color fastness to rubbing of textiles is one of the methods for measuring the color fastness of textiles, and it is an important assessment index for the color fastness of textiles. The color fastness to rubbing is to assess the resistance of dyes to mechanical friction. The principle is to rub the textile sample with a dry rubbing cloth and a wet rubbing cloth to evaluate the staining degree of the rubbing cloth. How to test  rubbing fastness (depend on iso 105 x12) Purpose To measure the resistance of the color of textiles to rubbing and staining to other materials, and to reflect the quality of the color fastness to rubbing of textiles through the color difference rating of staining. Preparation Rubbing fastness tester: it can rotate.

  Definition of colour fastness The so-called color fastness refers to the degree of fading of dyed fabric under the action of external factors (extrusion, friction, washing, rain, exposure, light, seawater impregnation, saliva impregnation, water stains, sweat stains, etc.) during use or processing. It is an important index of fabric. Color fastness refers to the resistance of the color of a textile to various effects during processing and use. The fastness grade is evaluated according to the discoloration of the sample and the stain of the undyed lining fabric. The colour fastness test of textiles is a routine item in the intrinsic quality test of textiles. Textiles will be subjected to various external effects such as lighting, washing, ironing, sweat stains, friction and chemical agents during their use. Some printed and dyed textiles have also undergone special finishing processing, such as resin finishing, flame retardant finishing, sand washing, wool grinding, etc., which requir

The color fastness of textiles to washing refers to the fabric’s capacity to retain its original color under washing circumstances, that is, the ability to not fade or change color. Almost all textiles are washed in people’s everyday lives. The fabrics are cleaned in a washing liquid at a certain temperature. The dye will come off the textile due to the action of the washing liquid, and ultimately the original color of the textile will alter, which is known as discolouration. At the same time, the dye in the washing liquid will contaminate and modify the color of other fabrics, a process known as staining. Whether or not the color fastness to washing is excellent or bad, it will effect the staining of other garments worn on the body, or it will stain other clothes when washed with other clothes.       The standard of washing fastness Color fastness to washing is one of the common test items for textile color fastness. It mainly tests the color fastness of textiles used in clothing and