In order to make the “geometrical folded book n° 2” I shown you HERE, you need :
On a sheet of paper, I draw a mark 10 cm from the right margin.
Mark each sheet at the top and the bottom.
(I made a large mark to show you, but more it’s discreet better it is).
On another part of the sheet of paper, mark herringbones.
They are 2 cm height and there is 2 mm between each.
I recommend to you to use a different color for each herringblone (take a closer look at the picture).
I started the first one at 4.5 cm from the top of the book and the last one is 4.5 cm from the bottom.
Keep going on (green, purple, clear blue, black… ) until the last herringbone
Then keep on marking by raising (black, clear blue, purple, green, red, brown….).
With a ruler and a point (mine is a winkle pin but you can also use an empty ballpoint pen) score the fold between the upper mark (10 cm) and the upper side mark.
Score also the fold between the lower mark (10 cm) and the lower side mark.
As folded sheets take up more space you can’t close anymore the book.
The sculpture effect is emphasized with an old book with yellowed sheets.