However, the pressed issue is accepted and does not get the qualified or restored tag. That is a monster difference in the grading industry. I got burned by cheating sellers and got restored comics many moons ago that I was not aware that they were restored. From there, I educated myself on the subject.
In theory I could even get the ink from the issue that is "being restored" by getting ink to a liquid state and spreading the ink next to the color break to cover the color break. In that scenario I am adding no outside source and using the ink from the issue itself to fix color break.
You need knowledge of using tantalum, molyebdenum, tantalum carbibe and have access to it to get to this level of fixing color breaks.