If pores are formed in the same area, it should be checked whether the tampon and cliché are damaged, and they should be replaced if necessary. Causes and solutions:

Causes of Tampon

If the bumper is too flat, a cone-type bumper should be used.
If the pad surface is damaged, the pad should be replaced or the damaged area should be kept out of the print area.
If the pad is too soft, a harder pad should be used.

Causes of Cliché

If an error has occurred due to bad acidification or pollution during the creation of the cliché, the cliché must be made again.

Reasons Caused by Ink

If the ink is too thick, it should be tried by adding thinner.

Reasons Based on Material

If the material surface is rough, a buffer suitable for the rough surface should be used.
If the material surface is dirty, surface cleaning with alcohol should be applied before printing.

Other Causes

If the ink is contaminated with silicone or oil, the ink must be renewed.