How the brush roller solves the common problems of printing resin plate making_common problem

In recent years, the water-soluble solid photosensitive resin hair brush plate has simple plate-making process, low cost, no pollution, good ink transfer performance, high printing resistance, light plate material, short plate-making cycle, and the brush roller can be combined with the computer laser phototypesetting system. Forming the advantages of matching, the brush roller is favored by small and medium-sized printing manufacturers, and the brush roller is gradually replacing the zinc plate. Photocrosslinking agent, and made a relief plate material with photosensitive properties. Almost all photosensitive resin plates are irradiated by light (mainly ultraviolet light), and cross-linking reaction occurs between molecules, thereby forming a relief-type image with a certain insolubility of the brush roller. The photosensitive resin plate can be divided into two types of brush rollers, solid type and liquid type, from the plate making process. The brush roller is composed of saturated photosensitive resin and the solid type series of prefabricated plates are relatively expensive, but the quality is better. The brush roller can produce commodity packaging, trademark plates, and wire patterns; the brush roller is composed of unsaturated poly The liquid type series of ester resins that are coated plate materials (in short, photosensitive liquid is prepared for base production when used, and then the resin is coated, photosensitive and made). The price is relatively low, and it is suitable for rougher ones. Text line version. The following problems often occur in the actual operation of the brush roller in the solid photosensitive resin plate making process. Only by comprehensive analysis, the brush roller is treated differently, and the root cause of the problem can be found to solve the problem. 1. Resin plate text, lines, pattern lines are too thin or too small, small characters and independent dot brush rollers fall off, and small lines are bent on resin plate making. What are the common problems such as thin lines bending and small text, independent dots falling off, etc. . The main reasons: l. The resin plate is not exposed for enough time; 2. The negative film contrast is small, foggy and unclear; 3. The resin plate is baked and thermally cured improperly; 4. The water temperature is low when the resin plate is brushed, and the washing time is long. The brush roller bristles are too hard and the brush plate is too deep; 5. The pressure of the brush roller on the machine is too large and the adjustment is improper. Solution: 1. When making resin plates, when the brush roller encounters small characters, lines, patterns, and independent points, the correct exposure time must be mastered. The 3kw iodine gallium lamp has an exposure time of about 20 minutes. It must be longer than the normal version. In this way, the small lines, text, and independent points can stand up and do not fall off. Due to the long exposure time, the prepared resin plate has a relatively small slope (about 70°) on the textured side, and the graphic base is firm. 2. When baking the resin plate, drying and thermal curing treatment, under normal circumstances, the temperature of the oven is controlled at 60-80 ℃, the purpose is to evaporate the moisture on the plate; the drying temperature is too high, the resin plate is easy to foam. 3. The operator is required to have excellent darkroom technology with brush and roller, and the contrast of film processing should be as human as possible, without fog, text and lines are smooth and clean, and there is no lack of pen breaks. 4. When the brush roller is making solid resin plates, whether it is automatic plate brushing by the plate making machine or manual brush brushing, the water temperature should be controlled at 50-60 ℃, and rinse until the base is exposed. When brushing the resin plate, you need to rotate the brush. Brush the plate on one side. It is easy to brush the side slope, causing the bending and falling off of the small lines. When brushing the plate, choose those brush rollers with soft and suitable bristles. If the bristles are hard, then It will cause small text to be brushed off and damaged; when brushing the resin plate, pay attention to the depth of the brush. The brush does not have to be washed to see the foundation. If the brush is too deep, the text, lines and patterns on the plate will be brushed off. In addition, Note that the time for brushing and flushing should not be too long. 5. When the resin plate is printed on the machine, the brush roller should be adjusted to adjust the pressure between the ink roller and the resin plate, and between the resin plate and the impression cylinder. Adjusting the printing pressure of the resin plate is better than adjusting the copper-zinc plate and type printing. The pressure is less. Welcome to www.mxbrushmachinery.com