you are totally right that sending the shirts multiple times through the tunnel is less than ideal. but i will do one more test, where i mix the ink, let it sit for 12 hours /print+tunnel/ and then see if i get the left result which is more than ok in terms of brightness. Its just the waiting time of the ink which makes me wonder if i miss something else. (Like with waterbased white: tried to follow the manual, but.. cracking, so clearly my process is not optimized :-)