
Plain Lab · notebook
Sketch and Rule Notebook
A5 split-page ruling: blank above, lined below at 7.14 millimetres, twenty-four lines to the ruled half.
Specification
- Trim
- 148 × 210 mm · 5.827 × 8.268 in
- Pages
- 120
- Leaves
- 60
- Sheets
- 30
- Signatures
- 6 × 20pp
- Spine
- 6.86 mm
- Paper
- white
- Ruling
- sketch-rule
- Ruling pitch
- 7.14 mm · 20.25 pt
- Rows per page
- 24
Half of each ruled page here is set at 7.14 millimetres, twenty-four lines; the other half is left with nothing on it. That split is the entire specification, stated here rather than left for the parcel to reveal.
The ruled half is drawn as vector lines rather than a repeated bitmap tile, so it does not go soft when a page is scanned and enlarged, or printed at a size the file was never rendered at. One hundred and ten pages carry the two rulings the book is built from between them, split pages and fully lined ones at college pitch.
Nothing about the blank half is instructive. It is blank because printing a fixed use for it would have been a guess, and a guess is not a measurement.
What is inside
- Pages
- 110pp
- Blank above, ruled below at 7.14 mm on the split pages; fully lined at college pitch on the rest.
- Reference
- 10pp
- Conversion tables computed from definitions, and the pen test leaf.
The film
Page by page
A vertical film from our own bench — this page contacts nobody's server to play it, and downloads nothing until you press play.
Real pages


Made at the Hibrkraft bindery, Bogor · about the maker
Books that sit alongside it
- Sketch and Rule InsertSame ruling, other trimsketch-rule at 7.14 mm: 24 lines at a5 against 21 at 5x7
Questions
What is the ruled half's pitch?
7.14 millimetres, twenty-four lines.
How big is it?
A5, 148 x 210 mm, 120 pages, 6.86 mm across the spine.
Is the ruling printed as a bitmap?
No. It is drawn as vector lines, so it stays sharp at any zoom.
Is every page split?
Most are. A run of fully lined pages at college pitch closes the book for anything a split page does not hold.
Is it dated?
No.
Remember that all is but opinion, and all opinion depends of the mind.


