Mike, do you use the Epson 7010 with Cobra High Temp inks?
I just installed them along with the profiles downloaded from their site for that printer/ink. I haven't printed anything yet, but I've noticed that in the downloaded profiles there is a choice of profile to use depending on the substrate used. In the downloaded profiles there are 10 files. 4 for polyester cloth, 4 for aluminum plate & 2 for sublidecal. There is nothing there for FRP plastic such as license plates or for ceramics such as mugs. I've emailed Richard & he said there is a file in the download stating which to use but it's not there. Is this the same profiles you use. What setting do you use for mugs & FRP? I'm also waiting for Richard to respond with clarification on this. (I'll try to attach a pic of the profile files.)
I'm using the WF1100 with the Cobra inks. I only use one profile even though I do have a few for different papers/substrates.
What I found is that there some slight hue variances from substrate to even if I used the profiled as stated for it's purpose. I will often have the same photo on multiple substrate types, for example a tile and then a metal. So the customer would see slight variations in color hue if they looked at the different substrate types side by side. Subtle differences but certainly noticeable.
Your profiles may or may not exhibit that.
What I did was to print all the profiles onto poly cloth then look for the most accurate, then use that for everything. I tested the best profile I determined on poly cloth then transferred onto all the substrates I use. Then I just have a specific Gamma adjustment for each different substrate using the common profile.
Profiles for different substrates are OK in theory, but I think if you are going to employ them it's best to have those made custom for
your printer/ink combination such as Pisque describes above if you are going to split those fine hairs. If you find you prefer to have specific profiles for different substrates then best to have
your printer dialed in tighter as well, not just the substrate.
Profiles for different substrates really differ in that the whiteness of the substrate, the gloss, and the ability of the coating to absorb the dye is what really varies. So a Gamma adjustment handles that real well for me. It's no less convenient for me to have to set Gamma as it is to place a different profile for each item, but I eliminate any slight hue differences by using a common profile.
Since the profiles are really generic I don't think you can achieve the same hue consistency as if you made your own profile for
your printer, not one used for all printers of the same model.
If you have blank FRP mostly then try the different profiles onto blank FRP material and determine the best one to run with, even if the profile was meant for a different substrate run with the best one you find.
Use this test file for your testing.
http://www.gballard.net/dl/PDI_TargetFolderONLY.zip
You should also be aware that your specific paper, quality setting and paper type in the Epson driver matter. So you should try ie matte paper and plain paper settings and see which settings work best with what profile, even though the profile is supposed to be specific to paper and driver settings.