The Flush Mount Album and the Fine Art Album uses pages known as Standard, and Thick in its albums. The only difference between the these pages is in the thickness of the substrate core inserted in between the photo paper. You can select the color of this substrate core in either black (default) or white. The Standard paper is 1.1mm in thickness whereas the Thick paper is 1.5mm.
The Standard pages are 1.1mm and consists of a 0.5mm paper and 0.6mm substrate core. Our 1.1mm pages max out at 70 pages (35 sheets).
The Thick pages are 1.5mm and consists of a 0.5mm paper and 1.0mm substrate core. Our 1.5mm pages max out at 50 pages (25 sheets).
The pages in the Little Black Book and Layflat Photo Book are hard and cannot be folded similar to the Flush Mount Album. It uses a similar substrate core in between its page but is thinner at 0.72mm in thickness instead.