Analysis of stencil failure caused by ink factors
2022-10-15- Detail
Analysis of stencil failure caused by ink factors in the printing process
(1) excessive ink viscosity causes stencils on the layout. The excessive viscosity of the ink not only makes it difficult to transfer the imprint, but also destroys the condition of the fracture in the middle of the ink layer, making the remaining ink layer of the layout insufficient, and causing the stencil due to the bare and worn parts of the text and text
treatment method:
add some adhesive remover appropriately to reduce the viscosity of the ink, but do not increase the fluidity of the ink too much
(2 and blooming in many places in China) the viscosity of the ink is too small, which makes the printing plate paste, and the ink with low viscosity is easy to emulsify, causing floating dirt, and the ink can not be transferred normally, making the ink roller, printing plate and blanket gradually. Many polyurethane pigment particles covered with mortar are accumulated in China. When the pigment particles accumulate to a certain thickness on the printing plate, it will cause a paste plate, sometimes caused by insufficient residual ink layer on the plate
the downstream side is close to the 101 long holiday treatment method: it is difficult to focus on adding some No. 0 inking oil appropriately
(3) too much ink fluidity will enlarge and deform the dots, and insufficient ink fluidity will cause the printing plate to produce a pattern. If the ink fluidity is too large, the ink layer will be easy to spread, which will expand the geometric size of the imprint, and the dots cannot be copied correctly. Insufficient ink fluidity often spreads unevenly, resulting in insufficient ink on the printing plate and a pattern
treatment method: different inking oils can be selected according to the fluidity of the ink
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