Details:

Heavy paper, pretty much card, with a medium horizontal grain.

The paper would actually be two medium weight high grain sheets, glued together to form a single page.

The glue would be waterproof, preventing ink or watercolor from bleeding through, and to prevent the leaves from separating.

There would be 100 of these sheets.

The spine would be designed to splay at the binding for the pages, so two pages can be opened up and flat, rather than curved like glued pages.

Each page would be individually bound into the book.

To remove pages, it would come with a small knife, capable of cutting only one page deep.

It would have a composite wood cover, unglazed, but sanded smooth. Ideal for surface customization.

It would have a ribbon bookmark attached to it's spine.

It would have a folding board edge cover with lock (And key) to hold it shut, and protect it's pages' edges from damage while being transported. (These exist, but they all use magnets. Nobody puts locks on books, and they should.)

The edges of the pages would be dipped in gold paint. Because it's sexy.

Between every page would be a thin sheet of waterproof paper, which is easily removed, to prevent wet pages from staining or sticking to each other.

The pages would all be square. (By angle. In actuality, they'd be rectangles)

Although the cover will have rounded corners, the pages will be very sharp cornered, for potential framing or scanning.

And it would all be acid free.

And it would cost a mother fucking fortune to produce.

Still, it'd be worth it. So many sketch books are just garbage, I'm starting to get desperate enough I may try to make my own! Not as ambitious as this design, perhaps, but certainly something WITHOUT the glued binding that falls apart, without the soft cover and without the "tear on the dotted line" things which slowly fold themselves as you turn the pages and eventually leave your book falling apart!