Pressing is an art and there is not a set way to press all comics. Depending on the age of the comic, different quality/type of paper is used for the insides, covers, etc…so a process that might work for comics from the 1980’s probably wouldn’t work with the comics of today.
You can’t use the same process/techniques on all comics. Pressing techniques work for some era’s and not for others due to paper type/quality. You have to take EVERYTHING into consideration… glossy covers, thicker stock, different color pages, It varies from Golden, Silver, Copper and Modern Age books.
It’s important to know the background, experience and history of the person you entrust to press your comics.