Not even plus or minus 25%. Consider patch print.Unfortunately, there is no direct relationship with ink consumption and image area of the plate. It depends on what is being printed and errors can be quite large if one bases consumption on image coverage alone.
I doubt that the ink reduction caused by wet trapping is anything more than negligible in actual production presswork.Ink consumption. If one wet traps ink onto another layer of ink, one does not print as much ink as if one dry trapped the ink.
Some say that only about 70% of the ink is printed when wet trapping as compared to dry trapping or the amount of ink that is printed directly on the substrate.
By negligible I mean that typical production presswork the reduction in volume of ink usage caused by wet trapping is so little that it’s irrelevant.I am surprised you said this. What do you mean by negligible? As I stated earlier, it depends on what is being printed. If there is no overprinting, then it is not a factor. If there is a lot of overprinting, then it is a big factor.
In an average week you process what, 50 jobs?100? 150? 200? Let’s say about half of each job hits the mail or goes out to the customer. The rest goes to shelves in your warehouse so it’s ready when the client needs it. Juggling all this—and making money from it— requires Link to Article