The printing strength of the plate is not high, what should I do if the graphics and text parts fall off?

The printing strength of the plate is not high, what should I do if the graphics and text parts fall off?

Q:

The printing strength of the plate is not high, and the reasons and solutions for the part of the graphics and texts to fall off?

A:

【 Cause Analysis 】

① Exposure

Overexposed

Incorrect linear adjustment

Incorrect focal length

② Development

The developer is too thick

Too much supplement

Dirty or problematic conductivity sensor surface

The developing temperature is too high

The conveying speed of the developing machine is too slow

③ Printing

Too much pressure during printing

There are bumps and depressions on the blanket

Too much paper powder

Reagent adhesion (strong alkali, strong acid, organic solvent, revision liquid, etc.)

Ink pigment

④ Used chemicals that are not suitable for printing (especially alkaline cleaning paste)

【 Solution 】

Exposure at the correct settings

Redo linear adjustment

Ask the plate maker manufacturer to adjust the focus

Reset the correct developing ratio

Reset the correct replenisher ratio

Clean or repair the sensor

Set the temperature to 30C

Make sure the transmission speed is correct

Adjust the printing pressure to the correct value

Replace the blanket

Lower the fountain solution setting and change the paper

Stop using unsuitable chemicals

Use modified pigments as required

Use acid cleaning cream