Ink · MB7

Kuretake Shogei Purple-Navy Black

Kuretake, Japan. 書芸呉竹紫紺系黒. 20 paintings from 2026.05.07 to 2026.09.12, 19 shown here.

The record.

From the registry, rebuilt from Peter's researched material cards. Same composition as MB1 (Peter, 2026-09-30): natural animal glue and pure oil soot, the standard Shogei tier rather than Kiwami. Purple-navy black at full strength, soft tea-purple (茶紫) when diluted rather than grey. May thicken in cold; warm to room temperature. Shelf life about 5 years sealed.

BINDERanimal glue

SOOToil soot

CONCENTRATIONstandard

SIZEunknown

BEHAVIOUR

Three sources, side by side.

The maker's card, what is typical for this type (a reference, labelled so), and what Peter recorded at the table. Empty means not recorded.

In use.

Its life on the table, among the other inks of the year.

WHEN

Every photo day.

Each dot a photo day, sized by the paintings made with it. Highlighted: this one.

VISUAL MAPPING

Where the ink sits on MB7.

Every painting with this ink, cut into the same 72 zones and averaged: the brighter a tile, the more of each zone its paintings inked. 20 paintings. Open it in Visual Mapping.

THE ENGINE

What V23 read on it.

The mean rung on each ladder for paintings made with it, against the mean across every V23 reading. This mixes the material with the months it was used in; read it as a description only.

Bead: the mean rung on this material across 20 V23 readings. Ring: the mean across all 259. The line between them, and the number at the end, is how far this material sits above (cyan) or below (ember) the archive.