So as some of you may remember, a while back I ditched my multiple freesub double mug presses for a BC01 oven.
I have always done our mugs at 160 degrees for 23 minutes (with 20 mugs in the oven), but the text doesn't come out as sharp as I'd like it. So, I have tried reducing the time to 21 minutes and the text comes out nice and crisp and looks so much nicer than anything that ever came from the mug presses.
My issue is that if I have a design that has a solid black box for example, 18 of the 20 mugs will bake perfect, but 2 will come out with a green patch in the black box (or very occasionally a mottled grey as if it's not been in long enough).
Does anyone know what might be causing the green? Is it too low a temperature or not enough time? If I do them for 23 minutes I don't get the green but the text is not crisp.
Would really appreciate any feedback/tips.