1, plate burning common problems and solutions First of all, the point of network graphic film by the film transfer PS version Correct operation: Country is Positive commonly used type PS version, this plate is to prepare a good light-sensitive liquid coating to the surface treatment of aluminum plate, the photosensitive layer formed by heating and drying, storage to be made of pre-coated version use. Burn out when the photosensitive layer coated with a photosensitive film version and Yang Tightlock exposure to light some of the photosensitive agent decomposed and released nitrogen, caused by ring cracking, rearrangement of molecular structure, generate indanone compounds, water generated Sulindac compounds have been removed by the imaging processing of the photosensitive layer to light decomposition, non-sensitive area that is part of the graphic layout was preserved, made into print. We know that the film version of photosensitive layer film and PS exposure is good or bad influence an important factor in the quality of printing down, contact state different locations have different variation of the contact network good is a prerequisite for regulating the controlled transfer. Operators must comply strictly with the relative membrane surface, exhaust seal, to ensure good transfer of graphic network. But the production took place membrane face the back of the case, because the thickness of film base will cause light scattering, heterogeneous network transfer, the change can not control, should be strictly avoided. Daily production, this aspect more, as described below. 1, and blank virtual image halo Department not clean. To solve this problem, Plate First of all, to keep the glass clean. Use alcohol wipe, wipe should be both positive and negative side. Work was not sufficiently transparent, the amount of light penetration will be affected, drying out the version will be fuzzy. If the film Plate And not closely closely aligns the glass version, can also cause drying filter. Sometimes a film base with a long, paper tape above left many remnants of rubber, through brightness will be affected, and to make film and film-based paste was not so close, so long used film base to be replaced. Make-up, if the two images overlap, the image is also the same drying false. If used as Pibu long will result in aging, in some places will have a small amount of marginal leakage, PS version with film film will be posted, and do not drying out the graphics will be made virtual. If the machine with a longer time, we should check the vacuum pump is also enough. Tube is too long the rate will be cut down, exposure would be insufficient. Inspiration, if not from the middle and gradually go around, could result in air bubbles, PS version will have local fuzzy, this is to check the bottom of the plate. 2, PS version of outlets is not true. To solve this problem, check from the film. Burn out the film on the network have enough blackness, make printing down to slice on a plate on the network structure, can not afford to be covered in part (network) by the amount of light, causing photosensitive layer of photosensitive printing plate. Otherwise the plate will not be solid on the network, network printing will be out. Halo virtual network, we know that the network is absolutely clear, translucent black plane to a high degree of very steep transition between cladding is mutated into, the network's edge actually increases vertical interplay. Halo virtual network contrast, black level is slowly increasing from the edge. So, create a network large or small, tilt the edge. Print edition halo virtual network performance because of their color deviation caused by unstable, and often can see the print version of the occurrence of "small ideas lose" phenomenon. To solve this problem, pre-film proofing to conduct strict inspections, the black dot adequate and sufficient degree of clear edge. 3, do not reflect the subtle part of the work. If a hair silk, photos there, the plate becomes blurred. This is mainly due to inadequate exposure or the concentration of red version syrup too large to wash the fine department. 2, red version of the common problems and solutions After printing down to be washed version. If Plate processor Among the developing solution temperature is too low, the flush plate processor speed it too fast will shorten development time, imaging will be insufficient, plates will be red is not clean. If the concentration of developing solution is not enough time to add another tone developer solution too long, printed version will not fully develop.
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