The paper appears to drop hair, de powder fault, generally due to the poor quality of paper products caused by. In addition to the suggestion that the paper manufacturer should improve the quality of the products as soon as possible and require the return of the products, the operator can also take corresponding remedial measures according to the specific conditions of the printed paper
1、 Due to the reasons of raw materials and manufacturing process, paper may be dusted and fluffy in the printing process, which will accumulate on the surface of blanket, thus affecting the correct transmission of dot. In serious cases, the blanket will have to be scrubbed for every 1000 sheets printed, otherwise the blanket will be covered with dusting and fluffy, and the gloss of the product will be significantly reduced. If possible, overprint a white ink and water on the surface of the paper. Generally, scrub the blanket.
2、 Properly adjust the viscosity of the used ink, add appropriate amount of dispersant and diluent in the ink to reduce the viscosity of the ink, so as to improve the effect of the adhesiveness of the ink on the paper. Because the ink viscosity is too large, it is also easy to make the paper off hairy powder.
3、 Adjust the printing pressure to reduce the printing force between the rubber roller and the impression roller. Or choose the right printing speed, in order to reduce the speed. In this way, after imprinting, the stripping force between blanket and paper can be reduced.
4、 The paper prone to exfoliation, such as offset paper, relief paper, writing paper, etc., must be air dried before Taiyuan flyer printing, and the paper scraps, paper powder, paper ash and dust, ragged paper, etc. on the surface of the paper must be removed.
To sum up, besides the low surface strength of the paper, the improper selection of fillers and binders, and poor calendering are also the reasons for the de dusting and hair loss of printing paper.
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