Varnish Scrub Resistance Tester

The varnish scrub resistance tester uses a motor to drive a brush back and forth on the surface of the coating, simulating the wear caused by daily cleaning. It is used to test the scrub resistance of varnish coatings and evaluate their durability in practical applications. This instrument is widely used in paint production and quality inspection processes.
Selection
When selecting, pay attention to whether the instrument's reciprocating stroke and brush pressure comply with the testing standards, ensuring smooth motor operation and accurate counting. The brush material should be compatible with the varnish being tested, and the instrument structure should facilitate sample fixation, cleaning, and maintenance. Consider the laboratory space to choose an appropriate size, and confirm that the manufacturer can provide calibration services and spare parts support.

Terms

Standards

Instruments

Scruf Travel 20-300mm adjustable, speed range 1-60cpm, equipped with TFT full color display and intelligent Operating interface, supports manual testing and is compatible with a variety of standard accessories, suitable for coating Abrasion Resistance evaluation.

$ 12766.00

Scruf Travel 20-300mm adjustable, with +/- 1% speed accuracy, equipped with TFT display and intelligent Operating interface, supports multiple languages and accessories expansion.

$ 15011.00

Scruf Travel 300mm, speed 37cpm, total weight of brush and brush holder 450g, suitable for architectural coatings coating scrub resistance testing, in line with national standards.

$ 641.00

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

Using DC stepper motor drive and module slider system, smooth and safe operation; double brush combination can do two tests each time, brush movement Frequency 37 times/minute, peristaltic pump control adjustable liquid Flow velocity.

$ 2300.00

Using standard sand free fall brushing layer, straight grinding to expose 4mm substrate; can quantify the abrasion per unit thickness of the paint layer of sand volume, the inner diaMeter of the catheter 19mm, sample holder 45 degrees angle fixed.

$ 538.00

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

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

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

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

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

With two test stations, the load range is 50~ 1000g, and three typical wear resistance tests of alcohol, eraser and pencil can be carried out, which is suitable for wear resistance evaluation of various coatings and materials.

$ 572.00

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.