How to Perform Troubleshooting on Gravure Printing

How to Perform Troubleshoot ing on Gravure Printing

Introduction

In order to improve the quality of their printed products while maintaining the costs necessary to bring the product to market, gravure printers have historically been on the cutting edge of technology. They have incorporated newer, faster presses, more dependable and durable components and consumables, and cutting-edge control systems. Gravure printers nevertheless encounter a variety of print-related problems that prevent them from achieving their cost and quality objectives despite taking these measures. This troubleshooting manual was created by a variety of providers and manufacturers to the gravure print industry with the goal of assisting you in determining the issue's root cause and offering a workaround. Flexo CtP Systems. Miraclon. Cron. akk. Is the earliest Gravure Printing Cylinder Supplier in India.

1. Fixing the hue shift

Consult the department of cylinders first. Verify the register and that the cells are set up correctly. Adjust the electric eyes, then turn down the dryer's temperature, and finally fill the fountain with new ink (and add less slip compound).

2. Address drying issues

When ink dries on the cylinder walls, it is known as drying in. There are normally only two reasons for this: improper press conditions or ink that dries too quickly. There are several things you may do to improve the press conditions, including: Examine the oven's temperature, air flow, and blade angles.

Clean the cylinder, take away the attached spot air system, Aerated fountains, increase the press's pace.

Add a slow-drying solvent, reduce the viscosity, and alert the ink provider if the ink is drying too quickly.

3. Have a plan for dealing with an uneven appearance

The paper surface, big cells in the cylinder, pressure on the impression roller, and too thin ink can all contribute to the formation of dark and light patches that are referred to as puddling, mottling, and volcanoes. The problem may be resolved by adjusting the roller, consulting the cylinder department, or altering the ink viscosity.

4. Quit scuffling your tracks.

The ink itself, the press environment, or the paper are likely to blame for any scratches or scuffs in the ink. What you can do to solve the issue is as follows:

Add hardeners or wax to the ink.

Examine and correct the ink viscosity. Change the solvent system to improve the integrity of the ink film. Boost the oven's setting. Verify the paper's abrasion.

5. Don't Allow a StrikeThrough to Depress You

Increase the ink viscosity, oven temperature, and airflow while lacquering the cylinder and adding a pigment extender. If it doesn't solve the issue, it might be the paper itself, and the solution is to use less absorbent paper. If not, it might be the ink holdout, in which case you should speak with the producer.

6. Modifying Color Intensity

By lacquering a portion of the cylinder to reduce cell capacity, speaking with the cylinder department, adding solvent to lower the ink's viscosity, and adding a clear extender, you can fix the issue of too much color.

The following are some potential fixes when the color is too weak:

-By re-etching the cylinder, increasing cell volume -Raising the viscosity of the ink -Cylinder cleaning -Diminishing the angle -Swapping out the roller -Removing toner -Examining the automatic ink batcher

7. Increase Ink Volume

Enhance the starting process to minimize waste, use less absorbent paper, modify the ink-solvent ratio to achieve the required viscosity, reformulate the ink if it is absorbing the stock too quickly, and inquire with the manufacturer about the ink gravity values.

8. Prevent Frothing and Foaming of Ink

First, instead of letting the ink fall, try introducing it to the pan through a hose. Next, check the pump for leaks or slow down the pump to minimize agitation. You might also experiment with changing the ink's viscosity or adding a defoamer substance.

9. Modify Gloss Levels

If the gloss is too high, either use a coloured extender or add a solvent to lessen viscosity. Add a gloss extender, raise the viscosity, or use less solvent to increase low gloss.

10. Make sure color reproduction is consistent.

Here are several ways to troubleshoot color fluctuation, which can be caused by a variety of problems:

-For all operators, adopt a single set of processes.

-Utilize measured amounts only.

-Calibrating or equating the flow rates

-Inspect and clean the machinery in between presses.

-Use inks with similar strengths