How to check the quality of BOPP thermal sensitive synthetic paper?

Testing the quality of BOPP thermosensitive synthetic paper is a comprehensive process that involves multiple aspects of evaluation. Here are some key detection steps and methods:

1、 Appearance inspection

Surface flatness: Evaluate whether the surface of the paper is flat, without wrinkles, waves, or unevenness. This can be done through visual inspection or using a flatness tester.

Color uniformity: Check whether the color of the paper is uniform and consistent, and whether there are any color differences or spots. Color uniformity is crucial for printing quality.

Defect inspection: Carefully inspect the surface of the paper for scratches, stains, bubbles, and other defects using the naked eye or magnifying glass. These defects may affect print quality and paper durability.

2、 Size inspection

Length and width measurement: Use measuring tools such as calipers or micrometers to accurately measure the length and width of paper, ensuring compliance with relevant standards or customer requirements.

Thickness measurement: Measuring the thickness of paper using tools such as calipers or thickness gauges to evaluate whether it meets specific thickness requirements.

3、 Thermal performance testing

Thermal sensitivity: Test the reaction speed of paper at different temperatures to ensure that it can function properly at the specified thermal head temperature. This can be tested by simulating the actual printing environment using a thermal performance tester.

Color rendering speed: Evaluate the color rendering speed of paper after heating, ensuring fast and clear presentation of images or text.

Color clarity: Check the clarity of the printed image or text to ensure there is no blurring or smudging.

Thermal stability: Test the performance changes of the paper after multiple prints to ensure that it can maintain stable printing effects.

Thermal preservation: Evaluate the long-term preservation of printed images or text to ensure that they are not easily faded or deformed.

4、 Chemical performance testing

Harmful substance content: Detect whether the paper contains harmful substances such as heavy metals, formaldehyde, benzene, and bisphenol A to ensure that the product meets environmental requirements. This usually requires the use of chemical analyzers such as chromatographs, mass spectrometers, etc. for precise detection.

PH testing: Measuring the acidity and alkalinity of paper to ensure its safety for print heads and other devices. PH test strips or pH meters can be used for measurement.

5、 Physical performance testing

Tensile strength: Measure the tensile strength of paper to ensure its durability during printing and use. Use a tensile testing machine for measurement.

Tear strength: Evaluate the tear strength of paper to ensure its integrity during use. Use a tear testing machine for testing.

Water resistance: Test the performance of paper after immersion in water and evaluate its waterproof performance. Soak the paper in water and observe its deformation and fading.

Light resistance: Evaluate the durability of paper under light conditions and determine its degree of fading in sunlight. Expose the paper to a light source and regularly check for fading.

Temperature resistance: Test the stability of paper in high and low temperature environments. Place paper in high and low temperature environments and observe its performance changes.

6、 Print quality inspection

Print clarity: Evaluate the clarity and contrast of printed images by printing test samples. Use professional equipment such as resolution testers to quantitatively evaluate print quality.

Color saturation: Check whether the printed colors are full, bright, and consistent with the expected effect.

In summary, the quality of BOPP thermal sensitive synthetic paper needs to be comprehensively evaluated from multiple aspects. Through visual inspection, size inspection, thermal performance inspection, chemical performance inspection, physical performance inspection, and printing quality inspection, the quality of the paper can be ensured to meet relevant standards and customer requirements.