20 Pcs Book Board, Binders Board Chipboard Designer Bookboard Kraft Heavy Duty Chipboard Sheets Bookbinding Supplies for Book Binding Cover (Black, 12.5 x 10 Inch 80PT)

The boards seem sturdy enough to do the job that I bought them for. But upon opening the package I noticed all the boards have a musty smell and mildew starting. Just a caution to open up immediately when delivered and check the boards.

Sturdy black pieces are very nice looking, except where I'm finding that they crack when bent. Possibly wetting them before bending will help.

I'm a paper crafter and make my own mini and memory books. I use the chipboard for the book covers and spine. It can cut with a regular paper trimmer if you cut it on both sides and then bend to break. It is sturdy and not too thick. It is the perfect strength and size. I'm definitely buying again when I run out.

Still worked for my application but mildewed inside the plastic package

The media could not be loaded.  The material itself is very nice and sturdy, but the pack I received was completely permeated with mold. I'm not really sure how this happened, since the pack was sealed within 2 layers of plastic. Maybe some moisture got stuck in there before sealing, and then the summer heat did the rest?Anyways, this makes them unusable for any sort of craft, unfortunately. It looks like other buyers have had this problem to different degrees, so watch out for that, especially if you are buying the black ones where it is especially noticeable.