I’ve printed with Epson 7900 on Epson Luster, let dry (out gas) for several days then matted and framed behind TruVue UV glass. Framed prints are in a retail display window exposed to the bright sun. After a while a haze appears on the inside of the UV glass directly in front of the black ink (or very dark sections of the print) eventually completely blocking the view of the image behind while other areas of the image are viewable. As the inside of the glass is cleaned, the removed haze is yellow in color on the cloth.
1.What is the substance and why is this occurring? 2.Is this a black ink related issue or all the inks but since black absorbs heat more, it out gasses faster? 3.What can be done to preclude it with Epson Luster paper and Epson PK ink? 4.Would the use of Mat papers and MK ink preclude it while still displaying behind the UV glazing?
I would prefer to continue using the UV glazing in front of the print.