Booklet/book thickness calculation
Spine calculation
The figures below refer to the weight of standard paper types. Each weight indicates a single sheet.
(Make sure not to confuse a sheet and a page. 1 sheet = 2 pages)
The weights below refer to paper types imported by Meiri Print and Binding. Some sheets can have the same weight but different density, which affects the thickness of the booklet/book. Therefore, if the spine color is different than the color of the cover, it is best to ask for an accurate cover spread.
The weight of the sheet you choose must be multiplied by the number of desired sheets. The cover should be multiplied by two since it is composed of two sheets.
Thickness of gloss chromo paper:
80 gr = 0.06 mm
90 gr = 0.07 mm
115 gr = 0.9 mm
130 gr = 0.1 mm
170 gr = 0.13 mm
220 gr = 0.17 mm
250 gr = 0.2 mm
300 gr = 0.23 mm
350 gr = 0.27 mm
Thickness of matte chromo paper:
80 gr = 0.07 mm
90 gr = 0.08 mm
115 gr = 0.1 mm
130 gr = 0.11 mm
170 gr = 0.15 mm
220 gr = 0.19 mm
250 gr = 0.22 mm
300 gr = 0.26 mm
350 gr = 0.3 mm
Thickness of woodless paper:
80 gr = 0.1 mm
90 gr = 0.11 mm
110 gr = 0.14 mm
120 gr = 0.15 mm
140 gr = 0.18 mm
170 gr = 0.22 mm
250 gr = 0.32 mm
300 gr = 0.38 mm
Preparation of graphics for hardcovers
Hardcover is usually prepared with 2.4 mm or 2.8 mm thick cardboard wrapped with chromo paper, preferably with a thickness of 130 gr.
The flyleaf connects the cover to the inside of the book. In Hebrew books, the front flyleaf is composed of four pages, the first of which adheres to the cover in full, and the last of which adheres to the first inside page with a 5 mm thick adhesive stripe. The same goes for the back flyleaf, where the first page adheres with a 5 mm stripe to the last inside page, and the last page of the flyleaf adheres in full to the cover. The flyleaf is usually made with 120 gr woodless paper. Built-in flyleaves can also be made with the sheet of the inside pages.
The cover is larger than the interior by 3 mm on each side.
A 2-cm bleed should be added around the entire perimeter.
The thickness of the chosen cardboard type should be added to the thickness of the spine.
Sheet weight calculation formula
The weight of the paper is calculated by square meter.
As an example, we shall calculate a sheet weighing 80 cm whose dimensions are 57x89 cm. A total of 15000 sheets.
The weight of the sheet multiplied by the width of the sheet (divided by 100) multiplied by the length of the sheet (divided by 100) multiplied by the number of sheets (divided by 1000).
Booklet weight calculation formula
As an example, we shall calculate a booklet whose dimensions are: height 15 cm and width 10 cm; a total of 16 sheets (32 pages); paper weighing 80 gm.
We shall divide the dimensions of the booklet by 100 and multiply all the figures by one another:
