A layflat photo book is defined by one thing: pages that open 180 degrees with no gutter, so a photo or a two-page spread runs edge to edge without a gap breaking it down the middle. That's a meaningful difference from a standard book binding, where the center of a spread curves into the spine and can swallow detail right where two pages meet.
The construction behind that flatness is double-thickness paper — 190gsm stock mounted on premium cores — which gives the pages enough rigidity to lie flat without wrinkling, even after years of repeated flipping. Paper comes in a choice of matte or lustre finish, and the layflat binding is available across the range of cover styles, from a straightforward hardcover through to the more premium debossed or deluxe options. Page counts run from 24 up to 140, giving enough room for anything from a short trip recap to a full wedding album.
This binding tends to matter most for photos meant to be seen as a whole — a panoramic landscape, a wide group shot, a two-page wedding spread — where a standard gutter would cut through exactly the wrong part of the image. As with the rest of the photo book range, it's made to order, so build in a few extra days for proofing before a specific date.