This is probably a sill mistake by me.
I've printed a coaster for a friend and it turned out perfect
I then pressed a mug on the same printer same settings and it turned out like this
Much lighter. There is more ink left on the paper then there was on the paper used on the coaster.
I tried again with different setting on the press and still the same...
First press was 185deg for 180 sec
Second press 180deg for 210 sec
I'm using a signzworld press. And ricoh SG3110DN with sawgrass ink
Any ideas please?