I’ve been thinking about this myself. You would need a VERY sharp, shaped edge. a very steady hand and very careful attention to detail. I imagine a half-round wood chisel would be suitable. the type used for wood turning or carving. This needs to be as sharp as possible.
1st you would print out small stickers, cut to the shape of the Thumb tabs you want to create. One for each book or group.
2nd You would go to the first book you want to indes, and place the sticker in the right location. Place a hard, thin board of wood or plastic on top, and then close the remaining pages over the top. Then using the sharp round chizel, cut down through all the preceeding pages until you reach the board. Yse firm, steady pressure, and some of your own weight.If the chisel is not sharp enough you will make a real mess.
- mark the location of the tab for Exodus. and with a carefull eye for the angle of entry required repeat the process above.
- as you progress through the bible you will reach a point where you are only cutting through some, not all of the preceding pages. It is probably worth counting or calculating the number of pages involved. this will help get the correct starting place for each cut.
5 I would definately practice on waste paper, or an old damaged book which has similarly thin pages.