You know we've made several profiles for sintra, Ultraboard, and styrene. Which gives us good color Using onyx. We mainly print long runs of the same artwork. So what we do is print one and keep it as a sample. Now a month later we'll come back to that same job plug in the same information, profile, densities yata yata ya. and it almost never fails that the color will come up a little different. And we wind up playing with densities to get back to the color we started at. A profile should never change so much in a months times which leads me to believe its on the printer side. This printer is 5 years old now. could that be why? or is it ink brand?(we use sericol) or is it something different?