I have been printing these attached images on 330 ml Mugs without problems at preheat time 140 - Heat 180 (celsius) and time 60. Pressure heavy. Tried longer time, less and more heat on 150 ml. mugs from bestsub and get the black sometimes brown and sometimes faded at the bottom and near handle. Sometimes i get one good but the next two are crap. The mug wrap for these mugs are thicker than for the 33ml. Mug press is JTrans. Sawgrass ink with profile and Ricoh 3110. Any suggestions? I also preaheat the mugs in an oven.