So far, I’ve found 4 ways to do a removable page sketch book. But why, you ask? If the sketch book started as a spiral bound one, it’s nearly impossible to get a sharp image of the sketch on a flat bed scanner. There might be reasons why you want to remove just one sketch from a book… you don’t want others to see it, you don’t like it, or you’ve sold it! Perhaps you want to rearrange the sketches. Lastly, different kinds of papers can be used in the same book.
I first saw this done by Steve Reddy. Remove the spiral binding. Replace it with some number of book rings. These can be found in various sizes at any office supply store. This is the cheapest way to have removable pages. The disadvantage is it’s a little floppy. This could be corrected by putting in many more rings but then it takes more effort to get them all open. But it certainly makes the pages easier to scan.
It can be floppy.
Another cheap way is to use a three ring binder. A choice of papers can be included. All that is needed is the inexpensive binder and a hole punch. The disadvantage is it cannot be folded over and it doesn’t have a stable center.
The easiest is to simply buy it that way. The new Grumbacher “in & out pages” books come in Mixed Media or Watercolor. I have the later. It’s a bit expensive for a 7×10 inch book with 12 pages at $10.40 . But it works. Someone told me the 90# Mixed Media pages don’t hold up as well to being moved in and out very much. Always pull the pages out top to bottom.
The most expensive but also most versatile is the disc bound book. I have a long post about mine here. So far, this is my preferred method. My favorite one comes from Levenger, the most expensive source. The advantage is you can use any paper you want, including tearing down 20×32 inch watercolor paper sheets. The disadvantage is the cost, which includes having to buy a punch.