Interesting, I'll have to have something printed on this. I initially thought you were talking printing on metal (also an option but a fair bit more than +25%
I've looked at samples of various metal prints at a local shop. sometimes it works well other times not so much IMO (I wasn't impressed with the colour portrait i saw on Metal for instance but the B/W looked really good. Best were the landscapes.)
for those of you in the US Bay Photo was an early pioneer in the process
Metal Prints, Photographs Printed on Aluminum ? Bay Photo Lab
Cheaper than my local guy but shipping to Canada wipes out any savings plus+