This paper mainly summarizes the formation causes and solutions of 21 printing defects caused by ink problems. First, the hue is bad (can not lead to the standard hue) 1. Ink viscosity is too low Solution: Add original ink 2. Ink separation and sedimentation Solution: Constantly stir the ink bucket 3. Low ink intake Solution: increase the amount of ink 4. Poor ink transfer Solution: Check the rollers and plates Second, the viscosity is poor (can not reach the specified viscosity) 1. Shading of ink and wash Solution: Determine after the ink cycle 2. Foam generation Solution: Add defoamer 3. Solvent evaporation Solution: Add special solvent 4. Excessive dilution of water Solution: Add original ink and thickener Third, the print is poorly dried (dry too slowly) 1. The ink viscosity is too high Solution: Dilute the ink 2. Stacking ink Solution: adjust the plate pressure and layout height difference 3. Ink drying is poor Solution: Add a quick-drying agent 4. Paper splashing water, poor ink absorption Solution: Change to paper with better ink absorption Fourth, stacking ink 1. Plate thickness is uneven Solution: Correct the difference between the layout 2. The version is too large Solution: Reduce the plate pressure 3. Ink viscosity is too high Solution: Add thinner 4. The amount of ink is too large; Solution: Reduce the amount of ink Five, the production of raw edges 1. The ink viscosity is too high Solution: Reduce ink viscosity 2. The ink is drying too fast Solution: Add slow drying agent to adjust drying speed 3. The pressure is too large Solution: Reduce the plate pressure 4. Paper powder mixed with Solution: Filter the ink with a filter Sixth, printing is not clear 1. The plate thickness is uneven and the hardness is low; Solution: Correct the height difference and hardness of the layout 2. The version pressure is too large; Solution: adjust the plate pressure 3. Ink viscosity is too high Solution: Adjust the viscosity 4. The amount of ink is too large Solution: Adjust the amount of ink 7. Insufficient amount of ink on paper 1. Insufficient printing pressure; Solution: increase the printing pressure 2. The version of India is bad; Solution: Check the hardness of the plate 3. Paper ink is too high Solution: Reduce ink surface tension 4. Insufficient ink quantity Solution: Adjust the amount of ink Eight, the color of the ink color is not good 1. The base color is too large; Solution: increase the color printing pressure 2. The base color viscosity is too high; Solution: reduce the viscosity of the background 3. The ink of the ground color is too dry; Solution: speed up the drying speed of the base ink 4. The background color is dark; Solution: Change the color sequence Nine, bubble production 1. Insufficient ink defoaming ability; Solution: Add defoamer 2. Insufficient ink circulation; Solution: Increase the circulation of ink 3. The ink enters the air from the tube; Solution: Avoid inserting the return tube into the ink 4. The ink viscosity is too high; Solution: Reduce ink viscosity Ten, the water mark on the printing surface 1. Excessive viscosity and excessive coating amount; Solution: Improve point reading and increase ink volume 2. Over-dilution of ink; Solution: add thickener or original ink 3. The paper has poor ink absorption; Solution: Reduce ink surface tension 4. The ink quality is too bad Solution: replace the ink Eleven, drying too fast 1. The ink is drying too fast; Solution: Add slow drying agent 2. Poor ink stability; Solution: Add slow drying agent 3. Ink and ink mobility is too small; Solution: Add ink flow 4. The temperature of the plant is too high; Solution: The plant adopts cooling measures Twelve, the version 1. Poor ink flow; Solution: Reduce ink viscosity and adjust circulation system 2. The ink is drying too fast; Solution: Add slow drying agent 3. Poor ink stability; Solution: Adjust ink stability 4. Ink and ink penetrate into paper dust and dust; Solution: Filter the ink with a filter 5, the viscosity of the ink is too high; Solution: reduce viscosity Thirteen, spots appear 1. Excessive addition of defoamer; Solution: Pay attention to the right amount when adding 2. The printed ink film is too thin; Solution: Add original ink 3. The ink viscosity is too low, Solution: Add original ink Fourteen, dent phenomenon 1. Uneven printing layout; Solution: Correct the thickness of the layout 2. The paper is too thin, and the bar is uneven; Solution: Replace the cardboard, using a cardboard with a higher weight and a thicker thickness. 3. Printing sticks run poorly Solution: Adjust the plate roller 4. The printing pressure is too large; Solution: Adjust the press Fifteen, poor ink delivery 1. The ink viscosity is too high; Solution: Add thinner 2. Too much ink foam; Solution: Add defoamer as appropriate and mix well 3. The circulation duct leaks; Solution: Replace the catheter 4. The ink slag blocks the conduit; Solution: Clean the ink residue in the tube Sixteen, the printing plate wears too much 1. The plate pressure is too large; Solution: Reduce the plate pressure 2. Printing pressure is too large; Solution: Reduce the printing pressure 3. The thickness of the plate is not enough; Solution: Correct the difference between the layout Seventeen, ink gelation 1. The solvent is used incorrectly; Workaround: Use a special solvent 2. Mix other brands of ink; Solution: Confirm before mixing and supplier 3. Improper storage (unsealed); Solution: change ink 4. The ink storage time is too long; Solution: change ink Eighteen, the area of ​​the ink 1. The amount of plate transfer is too large; Solution: Reduce the amount of ink 2. The printing pressure is too heavy; Solution: press the pressure to relax 3. The ink is dried too fast; Solution: Add slow drying agent 4. Paper powder is mixed therein; Solution: Filter the ink with a filter Nineteen, the version is not easy to clean 1. The ink is dried too fast; Solution: Add slow drying agent 2. The plate is stored and improperly cleaned; Solution: thoroughly clean and store properly 3. The ink is strong; Solution: Use a strong lotion to clean Twenty, poor print resistance 1. Bad light resistance 2. Poor water resistance 3. The wear resistance is not strong Solution: Negotiate with the ink supplier and use the appropriate ink and ink Twenty-one, high water-repellent paper printing poor The ink viscosity is too low; Solution: Improve ink viscosity The surface tension of the ink is too high; Solution: Reduce ink surface tension Article source address: http:// Double Layer Worktable With Back Double Layer Worktable With Back,Double Layer Worktable,Double Layer Worktable With Back Stable,Stainless Work Table Jiangmen Xinxing Da Stainless Steel Products Co. LTD , https://www.xxdkitchenware.com