Liquid Yellowing Resistance Testing Machine

The liquid yellowing resistance tester evaluates the degree of color change in liquid samples by simulating ultraviolet sunlight exposure. Its principle involves using ultraviolet lamps to generate light of specific wavelengths, which irradiates the liquid in sealed sample chambers. The yellowing index is quantified using a color difference meter. This device serves to assess the color stability of liquid materials under light exposure and is applied in quality control across industries such as coatings, inks, and resins.
Selection
When selecting a liquid yellowing resistance test chamber, it is essential to consider the matching of the ultraviolet lamp wavelength with industry standards, and the sample chamber material must be resistant to chemical corrosion. The temperature control range should cover common testing conditions, and the colorimeter accuracy must meet detection requirements. The equipment dimensions should fit the laboratory space, and the operating interface should be simple and easy to maintain. Selection should be based on the actual testing sample capacity and commonly used standard specifications.

Terms

Standards

Instruments

Using 300W solar bulbs and hot air circulation heating, Temperature range RT +~ 120 ℃, can accurately control the test conditions, determination of material under light yellowing resistance performance, suitable for a variety of shoe material testing.

$ 1719.00

The 300W OSRAM bulb provides 365-400nm wavelength UV, Temperature Uniformity +/- 1 ℃, can be tested for yellowing resistance and aging at the same time, and the turntable Rotation speed 10 +/- 2rpm ensures uniform sample irradiation.

$ 1143.00

Suitable for laboratory sampling test, high corrosion resistance, can measure a variety of material density, with sampling test type for liquid special anti-corrosion accessories.

$ 123.00

300W yellowing resistant bulb provides 365-400nm wavelength ultraviolet, Temperature Uniformity +/- 1 ℃, can simulate the atmospheric environment accelerated testing, one machine multi-purpose support aging Oven function.

$ 1272.00

The equipment is designed according to the international coating stain resistance experimental method, the water Tank volume is 5L, the inner diaMeter of the flow pipe is 8mm, and the time control range is 0~ 99h99s. It is suitable for the stain resistance test of building exterior coatings.

$ 412.00

4-Terminal Resistance Measuring method is used to eliminate the influence of wire resistance. Test speed is up to 6 times/sec. Measurement current is less than 100mA to prevent temperature drift and ensure Precision and Stability.

$ 146.00

Impedance of PHY Glass film less than 500MΩ, with porous PTFE liquid complex and silver ion trap reference system, support 0~ 130 ℃ wide temperature measurement, Response is fast and stain resistance is strong.

$ 264.00

Using stain removal rate evaluation method, scruf speed 37cpm, load 1000g, can accurately adjust the liquid Flow rate, by measuring the reflection coefficient changes to evaluate the stain resistance of coatings.

$ 1103.00

Using 2-wire method and 3-wire method measurement, Ground Voltage Measurement range 0~ 200V, Ground Resistance Measurement range 0~ 1999 Ω, Response Time about 5 seconds, with continuous measurement and overload protection function.

$ 159.00

Using open liquid complex structure, equipped with solid polymer reference electrolysis solution, the membrane resistance is less than 200MΩ, suitable for -5~ 80 ℃ wide temperature environment, to ensure long-term stable measurement.

$ 243.00

Double grinding head assembly configuration, total weight 1500g, Reciprocating Frequency 37 +/- 2 times/min, Travel 300mm, can accurately evaluate the stain resistance of the film.

$ 719.00

The mobile sleeve liquid fluid design, equipped with silver ion trapping trap, Glass film resistance is less than 50MΩ, and the shell is made of lead-free Glass to ensure stable measurement and durability.

$ 469.00

With four adjustable friction Frequency 21/43/85/106cpm, friction load 20N, support linear reciprocating friction movement, power-off memory function to ensure that paraMeters are not lost, effective analysis of coating adhesion and wear resistance performance.

$ 1447.00

The use of national standard 06Cr19Ni10 stainless steel precision machining, high temperature resistance up to 300 ℃, low temperature resistance to -100 ℃, hardness ≤ 187HB, with acid and alkali resistance, grinding anti-sinking, anti-stick, suitable for dry grinding and wet grinding.

$ 154.00

Using mobile sleeve liquid complex and silver ion trap structure, the film resistance is less than 50MΩ, Glass film L-shaped design to ensure stable measurement, temperature sensor is NTC 30KΩ, suitable for 0-80 ℃ environment.

$ 340.00

Articles

Lab Mixer Selection - Viscosity Determines Torque
This article mainly discusses how to select a laboratory mixer based on the viscosity of the material. The higher the viscosity, the greater the torque required. Low-viscosity liquids are suitable for high speed and low torque, while high-viscosity materials require low speed and high torque.
Application of Transparent Constant Temperature Water Bath in Visualization of Material Thermal Deformation
The constant temperature water bath provides a stable environment for observing the deformation of materials after heating by maintaining a constant and uniform temperature of the liquid medium.
Improving Efficiency with Vortex Mixers in Biological Sample Pre-treatment
This article primarily discusses how vortex mixers enhance the efficiency of biological sample pretreatment. By generating a vortex motion through an electric motor, they enable rapid and uniform mixing of liquids, saving time and delivering better results compared to traditional manual methods.
Abbe refractometer measures the relationship between refractive index and concentration of liquid coating resins.
This article introduces the method of measuring the refractive index of liquid coating resins using an Abbe refractometer and calculating the concentration based on the relationship between refractive index and concentration.
Negative pressure method leak detector for testing vacuum packaging seal integrity
The negative pressure leak detector evaluates the seal integrity of vacuum packaging by simulating a pressure differential environment. The instrument places the sample in a testing chamber and creates a vacuum to form negative pressure. If there is a leak, air or liquid will seep into the packaging, and the result is determined by observing pressure changes or the presence of bubbles.
The oral dissolving film is uniformly coated by a film applicator and then dried and formed.
Oral dissolving films are prepared by a coating mechanism, where a liquid containing film-forming materials is uniformly applied onto a substrate, followed by drying to remove the solvent and form a solid film.
Abbe refractometer measures the refractive index and concentration of resin liquids.
The Abbe refractometer measures the refractive index of resin liquids using the principle of the critical angle of light, and there is a corresponding relationship between the refractive index and concentration within a certain range.
Surface Tensiometer Evaluates the Wetting and Spreading Properties of Resin Liquids
This article introduces how to use a surface tensiometer to evaluate the wetting and spreading performance of resin liquids. Wetting and spreading affect the adhesion and appearance of products such as coatings and adhesives, and the process can be described by Young's equation and the spreading coefficient.
Key steps for measuring the efflux time of varnish using a viscosity cup method
This article introduces the method for measuring the outflow time of varnish using a viscosity cup. The principle is based on Poiseuille's law, where viscosity is estimated by recording the time it takes for the liquid to completely flow out from the small hole at the bottom of the cup—longer times typically indicate higher viscosity.
Cobb Absorbency Tester Evaluates Paper Water Absorption Capacity
The Cobb water absorption tester is used to measure the water absorption capacity of paper or cardboard by simulating the liquid contact process and calculating the mass of water absorbed per unit area to determine the Cobb value.
Application of Paper Absorbency Tester in Sizing Process
The paper absorbency tester evaluates the absorption performance of paper by measuring the penetration of liquid on the paper. In the sizing process, sizing agents alter the hydrophilicity of the paper fiber surface, thereby affecting the paper's resistance to liquids.
Water Absorption Tester in the Detection of Tissue Paper and Paperboard
This article introduces the application of water absorption testers in the testing of tissue paper and paperboard. The instrument evaluates the water absorption performance of materials by measuring the mass or height of liquid absorbed by the sample, with common methods including the Klemn method and the capillary rise height method.
The flash point tester measures the safety baseline value of the solvent.
The flash point refers to the minimum temperature at which the vapor of a flammable liquid can be ignited. It is not a fixed value but depends on the testing method and instrument. Data measured by flash point testers serve as a critical basis for evaluating the fire risk of solvents and establishing standards for safe storage and operation.
Density Determination: Selection Strategy between Pycnometer Method and Densimeter Method
This article introduces two methods for measuring the density of substances: the pycnometer method and the densimeter method. The pycnometer method calculates density by measuring the mass of a sample of fixed volume. It is suitable for measuring liquids, powders, and small granular solids, offering high precision but slower operation, and requires temperature control.
Surface Tensiometer: Interpreting the Invisible Forces on Liquid Surfaces
Surface tension is the contractile force generated by the uneven forces acting on molecules at the liquid surface, influencing phenomena such as droplet formation and capillarity. Surface tension meters measure this force using techniques like the Wilhelmy plate method, the platinum ring method, or the pendant drop method. Their core components include force sensors, sample stages, and data processing systems.