I found few old topics about exothermic reaction after printing: different types of paper, inks, fountain solutions with and without coating and so on. Quite interesting information about linseed oil and vegetable oil-based inks. If I am not mistaken the main idea that there is a chemical reaction between paper and ink. I would be very appreciate if you share new information about this problem. For example, when you last time faced with this problem and how it was solved (if it was…) and what was the reason in your opinion. In my practice a have had different cases but i still have no clear version of what it is.