Varnished cardboard

Varnished cardboard is a material formed by coating the surface of paper with transparent resin paint, creating a sealed film layer on the paper through roller coating or spraying processes. This technique enhances the water resistance and durability of the paper, making it commonly used for printed products requiring surface protection, such as packaging box cover paper and book covers.
Selection
When selecting, pay attention to the basis weight and stiffness of the base paper, and ensure the coating matches the subsequent processing techniques. Consider indicators such as folding endurance and scratch resistance, and test the adhesion of the coating. Adjust the ink absorption of the coating according to the printing method, and select the moisture-proof level based on the storage environment. Verify the product thickness and die-cutting suitability.

Terms

Standards

Instruments

Measurement range 0-18mm, contact pressure 100kPa, contact area 200mm ², Indication Error 2.5μm, suitable for accurate measurement of paper and Cardboard thickness.

$ 517.00

Force range 5~ 3000N, accuracy +/- 1%, support ring pressure, side pressure, gluing, flat pressure and other 6 tests, equipped with 5.0 Touchscreen and thermal printer, suitable for paper Cardboard strength detection.

$ 2300.00

Measurement range 0-20mm, accuracy 0.001mm, contact pressure 20 +/- 5kPa, suitable for paper, Cardboard and sheet material Film thickness detection, in line with a number of international standards.

$ 401.00

Adopt pressure converter induction, capacity 50kg/cm ², oil feeding speed 175 +/- 5mL/min (Cardboard), automatically complete the pressurization and decompression operation, and automatically retain and print out the test results.

$ 1348.00

Using seven-inch color LCD screen display, Measurement range Cardboard 250-5600Kpa, chuck clamping method is pneumatic, modular integrated thermal printer and complete and detailed test data report.

$ 1663.00

The sampling length can reach 300mm, the sampling width error is +/- 0.1mm, and the notch parallelism is less than or equal to 0.1mm. It is suitable for accurate sampling of materials such as paper Cardboard.

$ 428.00

The inner section area of the metal cylinder is 100 +/- 0.2cm ², and the test water consumption is 100mm +/- 5ml. It is suitable for the determination of Water Absorbency on the surface of sizing paper and Cardboard. The operation is simple and the results are accurate.

$ 551.00

Sampling size Φ 125mm error +/- 0.2mm, thickness range 0.1~ 2.0mm, suitable for paper Cardboard surface water absorption weight detection, easy operation and high accuracy.

$ 554.00

Measurement range 20~ 1000J/m ², resolution 0.1J/m ², with Touchscreen operation and thermal printing function, suitable for a variety of Cardboard Internal Bond Strength accurate determination.

$ 3239.00

Test area of 100cm ², cylinder height of 50mm, can accurately determine the unit area of paper and Cardboard in the specified time surface absorption of water, using the Cobb test method for surface Water Absorbency test.

$ 451.00

Measurement range 0-20mm, Graduation 0.01mm, Contact pressure 20 +/- 2kPa to ensure High Accuracy measurement; 1000 +/- 20mm ² Sensor with parallelism ≤ 0.035mm provides stable and reliable thickness detection.

$ 438.00

Using the Cobb test method, the test area is 100cm ² +/- 0.2, and the pressure roller mass is 10kg +/- 0.5, which is suitable for the detection of Water Absorbency on the surface of sizing paper and Cardboard, and is not suitable for loose or unsizing paper.

$ 848.00

Measurement range 0-4mm, contact pressure 100kPa, equipped with dial indicator mechanism, can achieve accurate thickness detection, suitable for a variety of sheet materials.

$ 535.00

With 5~ 3000N force value range and +/- 1% accuracy, support ring pressing, side pressing, flat pressing and adhesive strength detection, using 3.2 inch LCD display and thermal printout.

$ 1080.00

Measurement range 0-4mm, resolution 0.001mm, contact pressure 100 +/- 10kPa, contact area 2 +/- 0.05cm ², automatic reciprocating motion to complete thickness measurement.

$ 843.00

Articles

The combination of hiding power chart paper and a spectrophotometer enables the digital evaluation of hiding power.
This article introduces how to combine hiding power cards with spectrophotometers to achieve digital assessment of hiding power.
Technical Details of Measuring Paint Contrast Ratio Using Black-and-White Checkerboard Method with Hiding Power Card
This article introduces a method for measuring the hiding power of coatings using black and white checkerboard paper.
Test card paper for coatings is used for evaluating the appearance and film thickness consistency of coatings.
Coating test card is an integrated testing tool used to evaluate the appearance and film thickness uniformity of coatings.
Application of Coating Rate Cardboard in the Determination of Coating Rate for Architectural Coatings
Coating rate card paper is a standardized substrate used to determine the spreading rate of architectural coatings. It features a smooth surface and stable parameters, which help minimize the influence of substrate variations and environmental factors associated with traditional methods.
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.