Double gray paper is a kind of commonly used packaging paper. It is a composite cardboard bonded by two layers of gray board paper. It has high strength and rigidity, and is widely used in packaging, printing, making folders and other fields.

Performance of detection
The performance test of double gray paper usually includes the following aspects:

Detection of base weight: The base weight per square meter is calculated by weighing the weight of a double-gray paper sample of a certain size. Precision electronic scales or balances are usually used for weighing.

Detection of thickness and uniformity: The thickness of double grey paper is measured by using manual or automatic thickness gauge, and the uniformity is detected by laser measurement or machine measurement method. Manual thickness gauges usually use hand-held thickness measuring instruments, automatic thickness gauges usually use laser triangulation to measure thickness, and the method of detecting uniformity can be carried out using machine vision systems.

Double gray paper performance testing items and equipment

Strength testing: through the use of strength testing instruments, such as electronic tensile machine, multi-function testing machine, to measure the tensile strength of double gray paper, compressive strength and other indicators.

Corrugated detection: by using corrugated altimeter or corrugated pressure tester and other instruments to detect the corrugated height and strength of double gray paper.

Packaging performance testing: through the use of packaging performance testing instruments, such as corrugated compression tester, corrugated bending tester, stacking tester, etc., to measure the compression strength, bending strength, stacking stability and other properties of the carton made of double gray paper.

Double gray paper performance testing items and equipment

Printability testing: through the use of printing quality testing instruments, such as printing precision tester, printing speed tester, ink adhesion tester, etc., to measure the printing quality of double gray paper, printing speed and ink adhesion and other properties.

Environmental protection detection: through the use of environmental testing instruments, such as volatile organic compounds tester, heavy metal tester, chloride ion tester, to measure the content of volatile organic compounds, heavy metals, chloride ions and other harmful substances in double gray paper.

Testing of tensile strength and elongation at break: The tensile strength and elongation at break of double grey paper are measured by using a tensile testing machine.

Detection of moisture content: By using moisture content tester to measure the moisture content in double grey paper, to evaluate its quality.

Acidity and alkalinity detection: by using PH value tester or ph tester to detect the acidity and alkalinity of double grey paper.

Double gray paper performance testing items and equipment

Water resistance testing: through the use of water resistance tester to measure the water resistance of double gray paper.

Wear resistance testing: through the use of wear resistance tester to measure the wear resistance of double gray paper.

Flexibility testing: by using a flexibility tester to measure the flexibility of double gray paper.

Test method and instrument
The specific detection methods and instruments of double gray paper are as follows:

Detection of basic weight: Take a certain size of double gray paper sample, weigh its weight, calculate the basic weight per square meter. Precision electronic scales or balances are usually used for weighing.

Double gray paper performance testing items and equipment

Thickness and uniformity detection: Use manual or automatic thickness gauge to measure the thickness of double gray paper, and by laser measurement or machine measurement method to detect uniformity. Manual thickness gauges usually use hand-held thickness measuring instruments, automatic thickness gauges usually use laser triangulation to measure thickness, and the method of detecting uniformity can be carried out using machine vision systems.

Strength testing: use double gray paper strength testing instrument to measure its tensile strength, compressive strength and other indicators. Usually use electronic tensile machine, multi-function testing machine, rupture strength tester and other equipment for testing.

Corrugating detection: use corrugating altimeter or corrugating pressure tester and other instruments to detect the corrugating height and strength of double gray paper. These instruments usually use photoelectric or laser sensors to measure.

Packaging performance testing: Use packaging performance testing instruments to measure the compression strength, bending strength, stacking stability and other properties of the cartons made of double gray paper. Corrugated compression tester can measure the compression performance of corrugated board, corrugated bending tester can measure the bending performance of corrugated board, stacking tester can measure the stacking stability of corrugated carton.

Double gray paper performance testing items and equipment

Printability test: Use printing quality test instrument to measure the printing quality, printing speed and ink adhesion of double gray paper. The printing precision tester can measure the printing quality, the printing speed tester can measure the printing speed, and the ink adhesion tester can measure the adhesion of ink and paper.

Environmental protection detection: use environmental detection instrument to measure the content of volatile organic compounds, heavy metals, chloride ions and other harmful substances in double gray paper.