How to avoid missing prints during the printing process of BOPP thermal sensitive synthetic paper?

To avoid missing prints during the printing process of BOPP thermal sensitive synthetic paper, the following measures can be taken:

1、 Material inspection and preparation

Check the quality of BOPP thermal sensitive synthetic paper

Surface condition: Ensure that the paper surface is flat and free of defects such as wrinkles, tunnels, and film patterns. These defects may cause ink to not adhere evenly, resulting in missed prints.

Cleanliness: Ensure that the surface of the paper is free of stains, impurities, or oil stains. These pollutants may hinder the transfer of ink, leading to missed printing.

Corona treatment: For BOPP thermosensitive synthetic paper that requires corona treatment, ensure good corona treatment effect to achieve the required ink adhesion.

Choose the appropriate ink

Ink type: Choose the appropriate ink type based on factors such as printing color, printing paper, printing speed, etc. Inappropriate ink may lead to poor printing results, including missed prints.

Ink quality: Ensure stable and pollution-free ink quality, with good fluidity and adhesion.

2、 Printing equipment and process adjustment

Check the pressure system of the printing machine

Ensure even and stable pressure on the printing machine. Insufficient pressure or uneven pressure distribution may cause ink to not transfer properly to the paper, resulting in missed prints.

Adjust the printing pressure to make it moderate and uniform.

Optimize printing process parameters

Printing speed: Avoid printing too fast and ensure that the ink has enough time to adhere to the paper.

Scraper setting: Ensure that the hardness of the scraper is moderate, and the angle and position of the scraper are set reasonably to ensure even ink transfer.

Template mesh: Ensure that the template mesh is unobstructed to avoid blockage that may prevent ink from passing through properly.

Keep the equipment clean

Regularly clean the printing machine and its related components, such as scrapers, templates, mesh rollers, etc., to avoid ink residue and blockage.

Pay special attention to cleaning the parts that come into contact with ink, such as the mesh roller, to ensure its good ink transfer performance.

3、 Environmental factor control

Control the temperature and humidity in the printing workshop

Temperature: Avoid excessive temperature fluctuations in the printing workshop and maintain a relatively stable temperature environment to ensure the stability of the ink state.

Humidity: In high humidity environments, the drying speed of ink will slow down, which can easily lead to ink flow or diffusion during the transfer process, resulting in missed prints. Therefore, humidity should be appropriately controlled.

Avoid electrostatic interference

Static electricity may cause ink splashing, adsorption of dust and impurities, etc., affecting printing quality. Therefore, measures should be taken to eliminate static interference, such as using static eliminators.

4、 Operating standards and training

Standardize operational procedures

Develop detailed printing operation procedures and standards to ensure that operators operate in accordance with the specifications.

Regularly train operators to improve their operational skills and quality awareness.

Strengthen quality monitoring

During the printing process, set up quality monitoring points to conduct regular inspections of printed materials.

Once quality issues such as missing prints are discovered, immediately stop the machine for inspection and adjust equipment and process parameters.

5、 Other suggestions

Use high-quality printing plates

Ensure that the exposure quality of the printing plate meets the standards, and that the dot size and shape meet the requirements.

Regularly check the flatness and dimensional accuracy of the printing plate to avoid missing prints due to damage or wear of the plate.

Reasonable storage of BOPP thermosensitive synthetic paper

Avoid prolonged exposure of paper to sunlight or humid environments to avoid affecting its printing performance.

Pay attention to moisture, dust, and insect infestation during storage.

By implementing the above measures, it is possible to effectively avoid the problem of missed printing in BOPP thermal synthetic paper during the printing process, and improve the quality and stability of printed products.