We have the same issue with our new L1800 printer and it tried everything from over printing white 6 times ect.So, despite all the advice from DTG and them saying it was not an ink issue, I cleared the lines and print head of the ink I had been using and refilled with new ink I had just purchased. Guess what..... it was bad ink. No matter how much I had agitated it or shaken it in the bottle, it wasn't coming out proper. Refilled the lines and within a few passes it was printing bright white on black shirts.
we did expect bad ink.
DJ where and what white ink did you purchase. We are from South Africa and need to import.