I've been doing a ton of coasters recently without any issues at all, print perfectly every time when printing 2 coasters at 60 seconds each at the same time.
When I do thinner items such as a tea towel or sublimatable card and printed using high pressure and recommended temps, i get parts where the ink hasn't transferred completely.
So...my thinking is this, it can't be a cold spot on the plate as this would show up on the coasters, pressure is quite high on the thinner items so i'm thinking whether this just needs a longer press time as the pressing area is larger, a towel for example will cover the entire platen, sublimation card is A4 size, both showed areas right in the middle where the image hasn't transferred properly, when cutting the card down into smaller strips they print fine in the middle of the plate?
Is this just a case of longer pressing, all of the mentioned above are printed for 60-70 seconds