What Is Light Fastness and Why Is It Important?
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 conditions.
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 conditions.
Why is light fastness important
The light fastness of fabric is an important index of fabric testing. Generally, the test of light fastness is to simulate the use or cleaning of textiles in daily life, so as to determine their light fastness level.
The problem of light fastness seems small, but in fact it has a great impact on the health of consumers. It directly relates to the health and safety of human body. When the products with poor light fastness are worn, the dye on the fabric will fall off and fade when they encounter rain and sweat.
Dye molecules and heavy metal ions may be absorbed by the skin and harm the health of the human body. On the other hand, they may contaminate other clothes worn on the body or washed at the same time, so the detection of light fastness is very important.
Light fastness is very important for textiles, so we strictly follow the requirements in the actual production process to ensure the quality of products.
The problem of light fastness seems small, but in fact it has a great impact on the health of consumers. It directly relates to the health and safety of human body. When the products with poor light fastness are worn, the dye on the fabric will fall off and fade when they encounter rain and sweat.
Dye molecules and heavy metal ions may be absorbed by the skin and harm the health of the human body. On the other hand, they may contaminate other clothes worn on the body or washed at the same time, so the detection of light fastness is very important.
Light fastness is very important for textiles, so we strictly follow the requirements in the actual production process to ensure the quality of products.
Light fastness tester
Application:
Water-cooled Weather Conditions Meter. To determine the color fastness and aging to sunlight, weather resistance, compound color fastness to sunlight-sweat of colored textile, leather, leatheroid, plastic, etc, by setting various parameters of irradiance, temperature, humidity, spray to simulate natural condition in lab. Be able to control irradiance real-time, automatically inspect and compensate irradiance, temperature, humidity.
Feature:
Presetting various specifications, or customized programs, meet diverse range of standards,including AATCC, ISO, BS, JIS etc;
Touch screen, and build-in PLC, real-time display the ongoing test’s graph, be able to presetting irradiance, temperature, humidity, and plot dynamic curve of them.
4500W water-cooled xenon arc lamp system, accurately simulate sunlight spectrum. Irradiance auto-compensates system, control irradiance, temperature, and humidity timely through a closed loop.
Irradiation control, light irradiance sensor monitor, digital setting, automatic compensating system, stepless irradiation regulation.
Accurate chamber temperature control, irradiation temperature, and heater raise the temperature, air conditioning refrigeration system.
Water-cooled Weather Conditions Meter. To determine the color fastness and aging to sunlight, weather resistance, compound color fastness to sunlight-sweat of colored textile, leather, leatheroid, plastic, etc, by setting various parameters of irradiance, temperature, humidity, spray to simulate natural condition in lab. Be able to control irradiance real-time, automatically inspect and compensate irradiance, temperature, humidity.
Feature:
Presetting various specifications, or customized programs, meet diverse range of standards,including AATCC, ISO, BS, JIS etc;
Touch screen, and build-in PLC, real-time display the ongoing test’s graph, be able to presetting irradiance, temperature, humidity, and plot dynamic curve of them.
4500W water-cooled xenon arc lamp system, accurately simulate sunlight spectrum. Irradiance auto-compensates system, control irradiance, temperature, and humidity timely through a closed loop.
Irradiation control, light irradiance sensor monitor, digital setting, automatic compensating system, stepless irradiation regulation.
Accurate chamber temperature control, irradiation temperature, and heater raise the temperature, air conditioning refrigeration system.
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