I believe this cardboard is from a fruit snack box.
I cut out a few layers, going into the cover a bit.
Then I brushed it with pva glue, I don't want to deal with loose pieces of the cardboard whilst embossing the images so a solid piece was needed.
I got the fabric at a thrift store for cheap. I think it's linen -but the color was perfect. This is T minus 5 minutes into embossing with a bone folder.
This takes a long time. Find an hour long tv show and get comfy.
The final product. There are 5 sections with 60-lb paper.