- There are several suppliers of double-side papers suitable for book work in letterpress. I have seen one of them used successfully with a photo book, which is why I have become interested in locating sources.
Moab does produces a 7x10 sheet scored to fold easily into a 5x7 card,
although its in only that size.
I was unable to find a double-sided paper for Hahnemühle. Epson Premium Presentation Matte is the one I saw used by a photographer Noah Beil; he used letterpess with his photos & printed it at the SFCB. It is only available in 8 1/2 x 11.