How to check the quality of PET matte silver thermal paper after printing?

Testing the quality of PET matte silver thermal paper after printing can be carried out from the following aspects:

1、 Appearance inspection

Surface flatness and smoothness:

Observe the surface of the paper with the naked eye or a magnifying glass to ensure it is flat, wrinkle free, smooth, and scratch free.

Color uniformity:

Check if the color of the paper is uniform to avoid color differences or spots.

Coating uniformity:

Observe whether the coating on the paper is uniform, as uneven coating may affect the printing effect and storage time.

Identification and Margins:

Check if the markings on the paper are clear and the margins are consistent to ensure printing accuracy and aesthetics.

2、 Physical performance testing

Thickness measurement:

Measure the thickness of the paper using a caliper or thickness gauge to ensure it meets the standard requirements.

Tensile strength and tear strength testing:

Use a tensile testing machine and a tear testing machine to test the tensile strength and tear strength of the paper, respectively, to ensure its durability during use.

Friction resistance test:

Wipe the printed paper repeatedly with a standard eraser or fabric to observe if the handwriting is prone to peeling or blurring.

3、 Chemical performance testing

Thermal reactivity test:

Test the thermal head at different temperatures and observe the reaction effect of the paper to ensure that it can work normally at the specified thermal head temperature.

Light resistance test:

Expose the paper to a light source and regularly check for fading to evaluate its durability under lighting conditions.

Water resistance test:

Soak the paper in water and observe its deformation and fading to evaluate its waterproof performance.

Temperature resistance test:

Place the paper in high and low temperature environments, observe its performance changes, and test its stability in different temperature environments.

PH value test:

Use pH test strips or pH meters to measure the pH value of paper to ensure its safety for print heads and other equipment.

Volatile Organic Compounds (VOCs) detection:

Use detection methods such as gas chromatography to evaluate potential harmful chemicals in paper and ensure compliance with environmental standards.

4、 Printing effect evaluation

Print clarity and contrast:

Evaluate the clarity and contrast of printed images by printing test patterns.

Color reproduction degree:

Check if the printed color matches the original image to avoid color differences.

Adhesion fastness:

Try to tear off the printed label by hand and check if its adhesion meets the requirements.

In summary, the quality of PET matte silver thermal paper after printing needs to be comprehensively considered in terms of appearance, physical properties, chemical properties, and printing effect. Through a strict testing process, the quality of PET matte silver thermal paper can be ensured to meet the standard requirements and meet the printing and usage needs of customers.