Varnish Washability Testing Machine

The varnish scrubbing resistance tester uses a motor to drive a brush back and forth on a test panel coated with varnish, simulating the wear caused by daily cleaning on the paint film. It is used to test the resistance of the paint film to repeated scrubbing and is suitable for quality inspection of products such as wall paint and wood paint.
Selection
When selecting, consider whether the scrubbing stroke and frequency range cover the testing standards. The brush material should match the actual usage scenario, and the equipment must have automatic counting and stop functions. Check the stability of the sample clamping to ensure the repeatability of test data. Choose a single-station or multi-station model based on the routine testing volume.

Terms

Standards

Instruments

Touchscreen operation, intuitive display, with frequency setting, digital display and automatic stop function, the liquid storage cylinder can adjust the dripping speed according to the national standard requirements, suitable for performance evaluation of various film composite treatment surfaces.

$ 848.00

Flow rate of scruf liquid can be precisely controlled by using double brush to accelerate the simulated abrasion scraping experiment, and various consumables such as brush, scruf pad and sponge can be compared and tested.

$ 1332.00

Made of stainless steel, the range is 10~ 100μm, Division 10μm, Dimension 65 * 36 * 1.5mm, suitable for Paints, varnish and other Coating Coating thickness measurement.

$ 119.00

Equipped with 18 standard color scale solution, prepared according to GB/T1722-92 standard, using an inner diaMeter of 10.75mm Glass testtube, Color comparison is carried out in the Color Assessment Cabinet to ensure accurate measurement results.

$ 136.00

Polygonal structure design, range 25~ 2032µm, in line with GB/T1764-79, GB/T134522-92, ISO 2808-74 standards, suitable for Paints, varnish and other Coating wet film thickness measurement.

$ 106.00

The aluminum alloy material ensures durability, the volume of 100ml meets the standard measurement requirements, and the 0.1 ℃ indexing thermoMeter can achieve accurate density determination, suitable for laboratory environment.

$ 125.00

The device can quantify the liquid transparency level, the wavelength range is 340-1000nm, the transmittance accuracy is +/- 1%, the operation is simple and convenient, and it is suitable for detecting impurities and turbidity.

$ 751.00

Aperture 4.26mm, viscosity range 200-1200cSt, outflow time 20-80 seconds, in line with ASTM standard design, can quickly determine the Newton type liquid viscosity, suitable for a variety of viscosity test scenarios.

$ 115.00

Using large torque stepper motor to achieve automatic reset to zero, indentation accuracy of 0.01mm, support 0.1-0 mm/s adjustable speed, through the indentation depth to determine the minimum depth of coating cracking or disengagement.

$ 3914.00

The conduit height is 1265mm, allowing pass/fail and grading tests to determine the minimum impact energy required for coating cracking or disbonding, and the punch diaMeter can be selected as 15.9mm or 20mm.

$ 596.00

The equipment adopts automatic counting mode, the length of the swing Rod is 500 +/- 1mm, and the total mass is 120 +/- 1g, which is suitable for testing the ability of the film to resist concave deformation.

$ 394.00

Conical mandrel size is 3.1~ 38 mm, length 203 mm, stainless steel material, wear resistance and corrosion resistance, can test the bending performance of steel, aluminum alloy and plastic sample, easy to operate.

$ 453.00

The stainless steel material ensures corrosion resistance, provides 600μm fixed film thickness accuracy, and the application width is 100mm, which is suitable for preparing uniform and comparable samples on flat substrates.

$ 146.00

8Mm diaMeter outflow hole design, durable stainless steel material, can be freely replaced with filter holder, expand the test range of viscosity Cup, meet different viscosity measurement needs.

$ 155.00

1000 +/- 5g dead weight and 500 +/- 5g payload combined pressure, equipped with 20 times reading Microscope to achieve 0.1mm accuracy measurement, can quantify the anti-indentation performance of coatings and support plastic deformation analysis.

$ 267.00

Articles

Drop Ball Method of Impact Testing Machine for Evaluating the Impact Resistance of Varnish
This article introduces the use of the falling ball method with an impact testing machine to assess the impact resistance of varnish. The method involves dropping a steel ball of specified weight from a predetermined height onto a test panel coated with varnish to observe whether the coating cracks or peels off, thereby evaluating its impact resistance.
Wet film thickness gauge measures the wet film thickness of varnish.
The wet film thickness gauge is a mechanical tool used to measure the thickness of liquid varnish coatings. It operates by rolling the gauge so that the tips of its teeth contact the substrate and leave marks. The thickness value is then obtained by the operator reading the scale of the first tooth that becomes coated with the varnish.
Method for determining the dynamic viscosity of varnish using a falling ball viscometer
This article introduces a method for measuring the dynamic viscosity of varnish using a falling-ball viscometer. It is based on Stokes' law, which calculates viscosity by measuring the time required for a standard small ball to fall a fixed distance in a vertical glass tube filled with varnish.
Muffle Furnace Ash Test Method for Determination of Inorganic Filler Residues in Varnish
This article introduces the method of using the muffle furnace ash test to determine the residual amount of inorganic fillers in varnish. The inorganic substances in varnish can affect the performance of the coating, making accurate determination of ash content important for quality control.
Pull-off Adhesion Tester for Quantitative Measurement of Varnish Adhesion.
The pull-off adhesion tester quantitatively measures the adhesion strength between a varnish coating and the substrate by vertically pulling off a test column. It is essential to ensure proper substrate preparation, complete curing of the coating, and the use of a suitable adhesive during testing.
Buchholz indentation tester measures the indentation hardness of varnish.
The Buchholz indentation test is a method for measuring the indentation hardness of coatings such as varnishes. It involves applying a specific indenter to the coating surface under a standard load, and after unloading, the length of the residual indentation is measured. A longer length indicates lower hardness.
Visual color comparison method using colorimetric tubes to determine the color phase of varnish.
Colorimetric tube visual colorimetry is a method used to determine the color hue tendency of varnish samples by directly comparing them with a standard color scale using the human eye. During operation, samples and standard liquid columns should be prepared using colorimetric tubes of consistent specifications under standard lighting conditions, and the hue differences should be observed in parallel.
Flash point tester for determination of closed cup flash point of varnish
This article introduces the method for determining the closed-cup flash point of varnish using a flash point tester. The flash point refers to the minimum temperature at which the vapor on the surface of the varnish ignites momentarily when exposed to a flame after heating. It is a crucial indicator for assessing the fire risk during its production, storage, and transportation.
Thermogravimetric Analyzer for Determining the Solid Content of Varnish
The principle of determining the solid content of varnish using a thermogravimetric analyzer is as follows: when the sample is heated, volatile solvents and moisture evaporate, leading to a decrease in mass, while the remaining solid mass stabilizes. The solid content is calculated by comparing the initial and final mass ratios.
Adhesion Tester Pull-Off Method for Determining Adhesion Strength of Varnish
This article introduces the test method for measuring the adhesion strength of varnish using the pull-off method. It involves adhering test cylinders to the coating and substrate with adhesive, then vertically pulling them apart with an instrument to record the maximum pulling force and calculate the adhesion strength.
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.
Application of Gloss Meter in Gloss Measurement of Varnish Coatings
A gloss meter is used to measure the gloss of varnish coatings by detecting surface-reflected light to quantitatively assess the appearance of the coating. The measurement is based on the principle of specular reflection of light, commonly employing angles such as 20°, 60°, and 85° to correspond to different gloss ranges, and follows standard formulas for calculation.
The pendulum hardness tester tests the scratch resistance limit of varnish.
The pendulum hardness tester measures the hardness of varnish by observing the attenuation of the pendulum's swing on the coating surface, with faster attenuation indicating a softer coating. The scratch resistance of varnish depends not only on hardness but also on elasticity and toughness. Hardness testing sets the basic threshold for scratch resistance.