I mount my Epson prints on foam board using a Seal dry mount press. This process requires pressure and a temperature of 170 degrees F for about 30 to 60 seconds. This works great with Epson's Enhanced Matte Paper. However, this paper is not available longer than 19" so for my 24 or 36" wide panoramas I have used Epson's Premium Luster Photo Paper. However, when I use this paper I get thin, dark, straight or curved lines of several inches long that are especially visible in blue sky areas. It seems that this coated paper cannot handle the 170 degrees F, but that is the lowest temperature of any of the many different dry mounting adhesive papers available. I've asked Epson for clarification, but haven't received a reply yet.
If you can shed any light on this issue, than I would welcome your inputs really much.