Xenon arc aging test chambers accelerate the weathering performance testing of coatings and other materials in the laboratory by simulating the ultraviolet, visible, and infrared parts of sunlight, while controlling conditions such as temperature, humidity, and spray. The testing requires systematic setting of key parameters such as light irradiance, temperature, humidity, and spray cycles, and follows standard methods like ISO and ASTM. After aging, material durability is evaluated based on changes in appearance such as color difference and gloss, as well as performance indicators like adhesion. The results can be used for material comparison, but it should be noted that laboratory testing differs from actual outdoor environments.
2026-04-03
This article primarily discusses how the impeller structure of a disperser affects its dispersion performance. The impeller is the core component of a disperser, and its design directly influences the uniformity and stability of the final mixture. The article analyzes key parameters of the impeller, such as blade shape, number, angle, and diameter ratio, all of which affect the shear force and circulation capacity during liquid flow. Different types of impellers, such as straight-blade turbines and inclined-blade turbines, have distinct characteristics—some provide strong shear force, while others offer better circulation effects. The article also mentions that selecting the appropriate impeller depends on factors like the viscosity of the material and the hardness of particles, as no single design suits all situations. Overall, optimizing the impeller structure requires balancing shear force and circulation while matching appropriate operating conditions to achieve an efficient and energy-saving dispersion process.
2026-04-03
This article discusses the application of laser particle size analyzers in analyzing the particle size distribution of paint pigments. It mentions that the particle size distribution of pigments affects the optical properties, stability, and rheological characteristics of coatings. Laser particle size analyzers calculate particle size data by measuring the scattering of light by particles, combined with models such as Mie theory. Commonly used parameters include D50, D90, and span. The article also emphasizes the importance of sample preparation, such as ensuring good dispersion and adhering to relevant standards like ISO 13320, to guarantee accurate results. These analyses can provide a basis for optimizing paint formulations and quality control.
2026-04-03
This article discusses the process of using a three-roll mill to handle high-viscosity inks. It begins by explaining that the equipment grinds materials through the shearing and squeezing actions of three rollers rotating at different speeds, making it suitable for high-viscosity systems. High-viscosity inks, due to their high solid content and poor fluidity, often face issues such as uneven dispersion and temperature rise during grinding. Key techniques include adjusting the roller gap and speed ratio, controlling temperature, and achieving the required fineness through multiple passes of grinding. The process involves steps such as pre-mixing, graded grinding, and cyclic testing. The article also addresses common problems, such as difficulty in feeding and failure to meet fineness standards, and provides solutions. Additionally, it emphasizes the importance of operational safety and equipment maintenance.
2026-04-03
The basket mill is a wet grinding equipment used in the fine chemical industry, such as ink production. It operates by using a high-speed rotating impeller to drive grinding media, generating shear and collision forces within the slurry to disperse pigment particles and reduce fineness. Grinding effectiveness is influenced by multiple parameters, including media size, filling rate, impeller speed, and processing time, which require synergistic optimization. This equipment allows for enclosed operation to prevent contamination. Through process control, it ensures that ink fineness stably meets industry standard requirements while also facilitating easy cleaning and adaptability to various production needs.
2026-04-03
This article introduces the application of high-speed dispersers in the preparation of water-based inks. It first explains the working principle of the equipment, which generates shear forces through high-speed rotation to disperse particles. It then elaborates on how water-based inks require pigments to be uniformly dispersed in water-based resins to achieve optimal printing results. The article details how high-speed dispersers break down pigment agglomerates during production and optimize the dispersion process by controlling parameters such as rotation speed and time. Finally, it points out that this equipment is suitable for preparing most medium- to low-viscosity inks, offering cost-effectiveness and ease of cleaning. However, for systems requiring extremely high precision or with high viscosity, it may need to be combined with other equipment.
2026-04-03
This article explains how an ink tackmeter measures the tack value of printing ink. Tack value reflects the ink's resistance to separation during printing, which is crucial for controlling print quality. Measurements are typically conducted using a rotary tackmeter, following international standards such as ASTM D4361, and must be performed under constant temperature. Tack value is influenced by ink composition, ambient temperature and humidity, and instrument parameters, so testing conditions must be standardized. The measurement procedure includes preheating, ink application, reading, and cleaning. Tack values can guide ink selection and printing adjustments, helping to prevent issues like picking. Regular instrument maintenance ensures measurement accuracy.
2026-04-03
The cupping tester is a detection device used to evaluate the ductility of coatings under biaxial stretching. During the test, a punch presses the sample into a die until the first continuous crack appears in the coating, at which point the depth of the punch's penetration is recorded as the cupping depth. A larger depth value generally indicates better coating ductility and stronger resistance to cracking. This test follows standards such as ISO and GB, simulating deformation in actual processing to provide references for coating development and quality control. Standardized operation is required during use, and comprehensive evaluation should be conducted in conjunction with other performance data.
2026-04-03
The paint flexibility tester is a device used to assess whether coatings crack or peel when bent. During testing, the coated sample is bent around mandrels of different diameters, and the surface condition is examined. The flexibility is evaluated based on the smallest mandrel diameter that does not cause cracking. This test is important for assessing the practical durability of coatings in industries such as machinery and automotive. The operation must follow standard procedures to control conditions such as mandrel size and bending speed. The results are influenced by factors such as coating composition, thickness, and substrate. Currently, testing technology is becoming more automated and precise. In the future, it may also incorporate computer simulations for more in-depth analysis.
2026-04-03
The ink rub resistance tester is a device used to evaluate the scratch resistance of ink on printed surfaces. It simulates mechanical actions such as friction and scraping to assess the adhesion strength and durability of the ink, and is widely applied in quality control and research and development in industries such as packaging and labeling. During testing, the device rubs the ink layer against a friction medium under specified conditions, and quantifies the results by observing phenomena such as peeling, scratches, or measuring color difference changes. Key influencing factors include load, speed, type of friction medium, as well as ink formulation and substrate material. The testing follows standardized procedures, and results are typically evaluated according to industry standards. With technological advancements, the equipment is evolving toward higher precision, automation, and efforts to simulate more realistic friction environments.
2026-04-03
This article introduces how a pendulum hardness tester measures the damping hardness of coatings. The principle involves evaluating the hardness and elasticity of a coating based on the time it takes for the amplitude of a pendulum to decay while swinging on the coating's surface. A longer decay time indicates a harder coating. During testing, specialized instruments are used under standard environmental conditions to record the time it takes for the pendulum to swing from a fixed angle until it stops. The results are expressed in seconds and can be influenced by factors such as coating thickness and degree of curing. This method is primarily used for quality inspection in industries like paints and inks. It adheres to international standards such as ISO and ASTM, is simple to operate, does not damage the coating, and helps accurately assess coating performance.
2026-04-03
This article introduces the method of measuring the hardness of coatings using a pencil hardness tester. It involves scratching the coating with pencils of varying hardness levels, ranging from 6B to 9H, to determine the hardness grade based on whether scratches are produced. During testing, specialized equipment must be used, and standard procedures should be followed, such as fixing the pencil angle, applying a specified weight, and pushing it at a uniform speed. The results are determined based on whether the coating is scratched, corresponding to different hardness ranges that describe the characteristics of the coating. This method is simple in equipment and convenient in operation, making it commonly used for quality control in coatings. However, it should be noted that it only reflects scratch resistance and has no direct conversion relationship with other performance indicators.
2026-04-03
The pull-off adhesion tester measures the bonding strength between coatings, linings, and other materials and the substrate by applying a vertical tensile force. During testing, the instrument secures the test dolly to the coating surface and applies a uniform pulling force until failure occurs. The maximum tensile force is recorded and then divided by the cross-sectional area of the test dolly to determine the adhesion strength. The test must adhere to standards such as ISO and ASTM, controlling parameters such as loading rate and test dolly dimensions, and observing the failure mode to analyze the results. This instrument is widely used in industrial protection, construction engineering, and other fields, providing quantitative data for material performance evaluation and quality control.
2026-04-03
The circle method adhesion tester is used to evaluate the bonding strength between a coating and its substrate. Before operation, it is necessary to inspect the instrument, prepare the samples, and control the ambient temperature and humidity. During testing, the sample should be secured, appropriate load and scratch spacing should be selected, and the stylus should be used to draw a circular scratch at a constant speed. After completion, the scratches are observed, and the adhesion level is evaluated by comparing them with standards. The test conditions and results should be recorded. It is important to regularly replace the stylus, calibrate the instrument, and adhere to safety operating procedures.
2026-04-03
The cross-cut test is a standard method for assessing the adhesion of ink. It involves cutting a grid pattern on the coated surface, applying and then peeling off adhesive tape, and observing the degree of ink peeling to assign a grade. The test requires tools such as a cross-cut knife and adhesive tape and must be conducted under standard environmental conditions. The steps include cutting, cleaning, applying tape, peeling, and evaluating the results. Adhesion is rated on a scale from 0 to 5, with 0 indicating the best performance. Factors such as the sharpness of the knife and consistency in operation can influence the results. This method is widely used for quality control in industries such as printing and automotive manufacturing.
2026-04-03
The adhesion tester is a device used to measure the bonding strength between a coating and its substrate. It applies tensile force until the coating detaches, records the force value, and calculates the strength. Common testing methods include the pull-off method, cross-cut method, etc., each with corresponding standards. During testing, factors such as substrate preparation and coating condition must be considered. The results help evaluate coating quality and are widely applied in fields like corrosion protection, automotive, and construction, providing a basis for process optimization and lifespan prediction.
2026-04-03
Ink fineness gauge testing is a method used to evaluate the degree of dispersion of pigment particles in ink. During operation, an ink sample is scraped across a fineness gauge with wedge-shaped grooves, and the scale position where particles begin to aggregate is observed. This scale value represents the fineness. A smaller fineness value indicates more uniform dispersion of pigments, typically resulting in better printing performance and color representation of the ink. This method is simple to operate, provides intuitive results, and is widely used in ink production and quality control, adhering to multiple domestic and international standards.
2026-04-03
The cone-plate viscometer measures torque through the rotation between the cone and the plate, enabling the analysis of the rheological properties of small ink samples. It is suitable for small-volume measurements, reducing interference from solvent evaporation. Parameters such as viscosity curves, yield stress, and thixotropy can be obtained to help evaluate the printability of inks. During use, temperature must be controlled, bubbles must be eliminated, and operations must be standardized to ensure data accuracy.
2026-04-03
This article introduces the method for determining the KU viscosity of latex paint using a Stormer viscometer. The viscometer measures the load required to maintain a fixed rotational speed through the rotation of a paddle, thereby calculating the KU value, which is related to the application and storage performance of the coating. During the measurement, the sample must be fully stirred at a constant temperature, the paddle immersed, and the load adjusted to achieve the standard rotational speed. The result is then derived using a formula or calibration table. Attention should be paid to temperature control, instrument calibration, and adherence to operational standards, referencing norms such as ASTM or GB. The measured KU value is used for quality control and formulation adjustments to ensure stable product performance.
2026-04-03
The rotational viscometer measures viscosity by detecting the torque experienced by a rotor rotating in the ink. The calculation formula is η = K × (T/ω). Before measurement, it is necessary to select an appropriate rotor, control the temperature, and calibrate the instrument. During operation, the immersion depth should be standardized, bubbles should be avoided, and data should be recorded at different rotational speeds to analyze flow characteristics. The viscosity of ink is influenced by temperature, rotor condition, and sample uniformity, requiring regular instrument maintenance. This method provides a critical quality control basis for the research, development, and production of ink.
2026-04-03
