Pay attention to the dosage of color printing packaging

The surface pulp fibers of Dalian color printing and packaging base paper are all bleached chemical wood pulp, and the amount of the surface pulp is increased to enhance the coverage of the mechanical pulp of the lining. The medium alkaline sizing process is adopted to reduce the amount of aluminum sulfate in the surface and increase the 13H value of the base paper. It has been proved by experiments that the pH value of the base paper layer is better between 6.5 and 8.0.

  In the process of making paper, the drying temperature should be strictly controlled to ensure that the drying temperature of the paperboard is dry, and the cold paper of the base paper and the coated paper is used. Good affinity and high lightfastness. Therefore, it is better to use high-quality organic pigments, and its performance in all aspects is ideal. More attention should be paid to the amount of coloring pigment

  The styrene-butadiene latex can be selected in combination with other latexes to ensure the strength properties of the coated white paper and to reduce the yellowing degree. First check the printing quality of the corrugated packaging box. Many manufacturers' quality in the printing quality is the pattern, the writing is clear, and the chromaticity is consistent. There is also error in printing, but it cannot exceed the corresponding requirements.

  Three paper samples were taken from each packaging unit for measurement, and the measurement results were expressed in all measured values to the nearest 1 mm. The measurement results are expressed in millimeters, accurate to 0.25 mm, and measured with a vernier caliper with an accuracy of 0.02 mm. The adhesive part of the gift box is processed by laminating, glazing, etc., the adhesive is difficult to penetrate the surface layer, penetrates into the paper, and the carton is difficult to stick; then the more light is reflected, the principle of light scattering is used. The gloss will drop. If the roughness is reduced and the surface is smooth and flat, the gloss will be high.