pbaccinelli

the shirts are 91 percent poly and 8 percent cotton and have been working beautifully for months....

So I have been getting nice crisp black sublimation after pressing my shirts for months. All the sudden in the middle of making 10 shirts with a lot of black in the design, the black started printing faded and then brown looking after more tries. I did not change any temp, or settings, paper etc. No changes to anything were made between successful transfers and unsuccessful ones. My print nozzle check has no spots. I can not for the life of me figure out what happened. At a complete loss, and need to get an order out....... Any advice out there? This is all the colors printed and pressed into a t shirt. It looks like the black is barely transferring but the other colors are?