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Failure reason: 1. Ink does not dry; 2. Rewind tension too much; 3. The room temperature for storing prints is too high
Remedy: 1. Increase the drying temperature; 3. Reduce rewind tension; 4. Printed products in a cool place
Paste, block version
Failure reason: 1. Plate is too shallow; 2. Printing pressure is too great; 3. Too much ink supply; 4. Ink viscosity is too high; 5. The ink drying speed is too fast;
Remedy: 1. Deepen the printing plate; 2. Adjust printing pressure; 3. Reduce the amount of ink supply; 4. Reduce the viscosity of ink; 5. Reduce drying temperature
Dyes
Failure reason: 1. Multi-color printing India and India behind the color, the former color is not dry; The color of the post-print causes the peeling of the previous color; 3. Post-printing color cannot be overprinted
Remedy: 1. Increase the drying speed of the first color; 2. Reducing the viscosity of the ink after printing or reducing the printing pressure; 3. Reduces post-viscosity or improves adhesion
Printed pinhole
Failure reason: 1. Ink on the ink roller to dry too fast, uneven ink transfer;
Remedy: 1. Slow down the ink drying speed;
Too light
Failure reason: 1. The viscosity of ink is too low; 2. Anilox roller wire is too thin; 3 Anilox roller is worn or not clean; 4. Ink is too small
Remedy: 1. Increase the viscosity of ink; 2. Replace the coarse mesh anilox roller; 3. Replace with a new anilox roller or thoroughly clean the anilox roller; 4. Reduce the pressure of the ink transfer roller or squeegee or appropriately increase the platen pressure (gravure) to speed up the printing (flexo)
The color is too dark
Failure reason: 1. The viscosity of ink is too high; 2. Anilox roller is too thick; 3. Ink saturation is too high; 4. Too much ink
Remedy: 1. Add thinner to reduce viscosity; 2. Change fine anilox roller; 3. Add a lighter to reduce the color depth Increase pressure on the transfer roller or squeegee or properly reduce plate cylinder pressure (intaglio)
Prints are spotted
Failure reason: 1. Plastic film thickness is not uniform; 2. Ink is too thin; 3. The viscosity of ink is large; 4. Printing ink uneven
Remedy: 1. Replace thick and thin film; 2. Add new ink; 3. Increase the viscosity of ink; 4. Reasons for uneven ink transfer from ink and ink inspections
Ink unevenness
Failure reason: 1. Plate is not even; 2. Substrate thickness is not uniform; 3. Inhomogeneous ink transfer, such as anilox roller wear; 4. The number of anilox roller lines is too low
Remedy: 1. Grinding behind the printing plate, or correcting with offset paper; 2. Replace the thick and uniform substrate; 3. Replace the anilox roller
Line hairs
Failure reason: 1. Ink drying is too fast; 2. Uneven pressure, improper pressure adjustment; 3. Environmental dust effects
Remedy: 1. Reduce the drying speed of ink; 2. Adjust the pressure between the plate and the anilox roller; 3. Reduce environmental dust
Imprinting is not allowed
Failure reason: 1. Uneven tension in receiving and discharging; 2. The film has lotus leaf edges; 3. Film joint is not flat; 4. The previous color is too much pressure to deform the image
Remedy: 1. Adjust the closing and discharging tension; 2. Adjust the tension and replace the film; 3. Rejoin the connector; 4. Adjust printing pressure
Poor print fastness
Failure reason: 1. Plastic film corona treatment insufficient; 2. . Plastic film printability is very poor; 3. Insufficient adhesion of ink
Remedy: 1. The plastic film is reprocessed and the surface tension is required to be 40 dyne or more; 2. Replace the plastic film; 3. Request improvement to the company
Unstable color
Failure reason: 1. There is a change in viscosity or pH; 2. The operation process is wrong; 3. Incorrect ink distribution process
Remedy: 1. Check the viscosity and PH value with the previous printing changes; 2. Check the operating procedure; 3. Reaction to company quality accident
Foaming
Failure reason: 1. Printing speed is too fast; 2. Add too much thinner or hardened tap water
Remedy: 1. Add defoamer
Drying too fast
Failure reason: 1. Printing speed is too slow; 2. Open for too long; 3. Ink drying speed is too fast; 4. Drying temperature is too high
Remedy: 1. Improve the printing speed; 2. Add diluent; 3. Add slow-drying agent adjustment; 4. Reduce drying temperature without even needing a drying system
Drying speed is too slow
Failure reason: 1. Printing speed is too fast; 2. Ink drying speed is too slow; 3. Low drying temperature
Remedy: 1. Reduce the printing speed; 2. Add slow-drying agent; 3. Improve drying temperature
Small Size Building Block
Small Building Block,Mini Building Block,Small Plastic Blocks,Mini Plastic Blocks
HAIPENGDA Plastic Toys Co., Ltd. , http://www.hpdtoys.com