A5 Semi-Log Notebook standing closed, sage cover with a cut-diamond motif reversed out, about seven millimetres thick.

Plain Lab · notebook

Semi-Log Notebook

A5 semi-log paper, one logarithmic axis and one evenly divided axis, eighteen rows to the page.

Price

from Rp 59.000

Softcover, French link sewing. Printed and sewn to order.

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Every cover and binding option is quoted when you order.

Specification

Type: Notebook
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: log
Ruling pitch: 9.17 mm · 26.00 pt
Rows per page: 18
Dating: Undated

Build it

CoverBinding

Custom print

Rp 59,000

One axis on this page does not move at a fixed distance for a fixed step. It moves by ratio, so the space between one line and the next shrinks as a value climbs from one to two and widens again on the approach to ten, before the pattern starts over one decade up. The other axis stays exactly as ordinary as a ruled row ever is, 9.17 millimetres apart, eighteen to the page.

A quantity that grows by doubling rather than by adding a fixed amount runs off the edge of ordinary squared paper within a few steps. Plotted against the log axis instead, the same growth can sit on something close to a straight line, which is the entire reason this ruling exists rather than another sheet of squares.

A straight line on this page is not proof of anything on its own. It is only easier to read than the curve it replaced.

What is inside

Plots: 110pp; One axis ruled by ratio, one axis ruled evenly, 9.17 mm between the printed rows.
Reference: 10pp; Conversion tables computed from definitions, and the pen test leaf.

In every book

The same six pages open every book: your details, who to call, the signs to point at when you have no shared language, and the map. They sit at the front because the moment you need them is not the moment to be flicking through.

This book belongs to: One page for your name and number, so a book that goes missing can come back.
My details: Blood group, allergies, who to call. Written once, carried everywhere.
Emergency numbers: Forty countries, taken from Wikidata property P2852 (CC0), agreed across two sources, every row carrying its QID. Numbers change and a book does not — verify locally on arrival.
Point at this: A pictogram grid captioned in English above and Indonesian below, for when there is no shared language.
World map: Natural Earth 110m, public domain, equirectangular, with UTC hour meridians computed from the projection rather than from a timezone database. For orientation and for pointing at, not a navigation chart.
Conversion tables: Computed from definitions — 25.4 mm to the inch — and not copied from anywhere, so every row can be checked by anyone holding the book.
Pen test leaf: The last page, printed for it on purpose. Every notebook is used this way; printing it deliberately is cheaper than losing the last leaf to it by accident.

The film

Page by page

A vertical film, 52 seconds: the cover, the ruling page, then 5 reference pages. Synthesised ambient bed, no dialogue — captions in three languages.

A vertical film from our own bench — this page contacts nobody's server to play it, and downloads nothing until you press play.

What is inside this book?

Five pages from the Semi-Log Notebook shown as cards: cover, divider, a semi-log ruled page, a lined notes page, and a conversion table page. — Five pages from the print file: the cover, a section divider, a semi-log page with its crowded and its spread-out lines, a plain lined page, and the conversion table. A curve that bends across ordinary graph paper can sit on a straight line here instead.

Specification card for the Semi-Log Notebook: one log axis, one linear axis, one hundred twenty pages total, A5 trim. — The greater part of the book is ruled with one logarithmic axis and one evenly divided axis, 9.17 millimetres between the printed rows, eighteen to the page, behind a section divider, with a shorter run of plain lined pages at the back. Ten pages of furniture, including conversion tables computed from definitions. A5, one hundred twenty pages total.

Computed from definitions — 25.4 mm to the inch — and not copied from anywhere, so every row can be checked by anyone holding the book. — Semi-Log Notebook — Conversion tables

Forty countries, taken from Wikidata property P2852 (CC0), agreed across two sources, every row carrying its QID. Numbers change and a book does not — verify locally on arrival. — Semi-Log Notebook — Emergency numbers

One page for your name and number, so a book that goes missing can come back. — Semi-Log Notebook — This book belongs to

A pictogram grid captioned in English above and Indonesian below, for when there is no shared language. — Semi-Log Notebook — Point at this

Natural Earth 110m, public domain, equirectangular, with UTC hour meridians computed from the projection rather than from a timezone database. For orientation and for pointing at, not a navigation chart. — Semi-Log Notebook — World map

The PDF of this book.

We do not sell the design or the PDF. Download it free, with no conditions at all, not even tracking. What we sell is the book, a real object that is genuinely useful and can help your life.

Download PDF PDF · 120 pages · 0.4 MB

Made at the Hibrkraft bindery, Bogor · about the maker

Try the ruling on paper first

The same ruling exists as a free, ready-to-print sheet. Print one, write on it, and decide whether the pitch suits your hand before you order the book.

Semi-Log Graph PaperFree PDF · 3 paper sizes