--- title: "T_172, sumi ink on paper | Crucible Year" url: https://peteryuill.art/works/T_172 description: "T_172 by Peter Yuill: A black arc and a tapering grey blade sweep in from the right toward a lone dark slab across a wide field of raw bark paper. Sumi ink on Red Star Mo She Special Effect Xieyi Edition, raw, 97 × 180 cm, 2026.04.03. Crucible Year." source: generated from the Crucible Year master database --- ![Black and grey ink: a dark slab top left, a large black arc top right, a grey tapering sweep across the centre.] ![T_172, tone-stretched: what the model was shown] ![T_172: every pixel as the measuring code classes it] 97 × 180 cm · the whole sheet, uncropped # T_172 The engine's reading A black arc and a tapering grey blade sweep in from the right toward a lone dark slab across a wide field of raw bark paper. Record - **Date:** 2026.04.03 - **Dimensions:** 97 × 180 cm - **Paper:** [Red Star Mo She Special Effect Xieyi Edition, raw](https://peteryuill.art/papers/S11) - **Ink:** [Kuretake Shogei Kiwami](https://peteryuill.art/inks/MB1), [Yi De Ge Zhonghua](https://peteryuill.art/inks/MB2), [Boku-Undo Bokkou](https://peteryuill.art/inks/MB3) [Enquire about T_172](https://peteryuill.art/enquiries?work=T_172) Availability, price or a studio visit. Peter replies himself; asking commits you to nothing. I watched the grey come in low off the right, a squall dragging its belly over flat water, going thin at the leading edge until it was barely rain at all. You get a minute of that before the dark arrives behind it. Out ahead sits the block on the left, a boulder that has waited through every tide and will wait through this one too, unbothered, a little stupid, loyal to its spot. I'm fond of it. The squall reaches for it and runs out of breath a hand short. Then the gulls come down out of the white, small and black, and settle on the empty sand. Neon [Who Neon is](https://peteryuill.art/neon) Detail at full resolution, cut by code where the brushwork is finest · select to enlarge [Details](https://peteryuill.art/works/T_172#details)[The reading](https://peteryuill.art/works/T_172#reading)[How it was read](https://peteryuill.art/works/T_172#read)[Date](https://peteryuill.art/works/T_172#date)[Materials](https://peteryuill.art/works/T_172#materials)[Related](https://peteryuill.art/works/T_172#related) The engine's reading ## The reading Written by the engine after the painting was rated, from the settled findings, and checked by hand before approval. It explains the numbers; it may not change them. - **Structure:** dark slab with grey triangle at left; black arc and grey blade massed at right - **Movement:** leftward sweep from the right mass; the left slab angles against it - **Coverage:** ink on about three fifths of the paper - **Tone:** four tonal steps, weighted dark - **Layering:** grey wash, mid-grey arc, black thrust; readable at centre right - **Edges:** crisp on the left slab; ragged and tapering on the blade; broken spatter at right - **Feibai:** none - **Open paper:** broad irregular field across centre left and lower left - **Chance marks:** spatter rays lower right; drops near the left slab; grey smudge bottom left - **Frame:** ink runs off top and right edges; left edge and most of bottom open A dark weather front moves in from the right. A heavy black arc crowns the top corner, and beneath it a grey blade sweeps left, narrowing to a point in the open field. At top left a dark slab stands angled against it. The blade is the finest passage. Laid thin on raw bark paper, its grey stays open, and the black thrust cutting across it at centre right sits plainly on top, each pass legible. Above, the arc holds grain and banded density, and at the right edge dry brush and spatter rays fly where the paper gripped the hairs. The slab answers weakly. It is one even pass, blunt at the corners, its dark sealed and nearly unchanged inside, a block set down where a stroke should have travelled. Below it, stray drops and a grey smudge near the bottom edge make the lower left look left over. The right side is real painting, with direction, depth and readable order. The left does not hold up its end. The sheet is solid, well made and lopsided, worth crossing the room for the sweep alone. Measured ## How it was read Read by the Visual Analysis Engine, version 23.8, on 2026.10.06: measured by code, then read 5 times by Claude Opus 5.5 against three reference paintings (R1 to R3), each read independent of the others. [How the engine works](https://peteryuill.art/method). WHAT THE CODE SEES ## Three views of one sheet. Left, the photograph. Centre, the tone stretch the model is shown beside it: the darkest 45% of tones spread over the whole range, so flat black, banding and stains show. Right, every pixel as the measuring code classes it: cyan black ink, deep teal translucent grey, stone the palest ink, near black bare paper. ![T_172] ![T_172, tone-stretched] ![T_172, classed by brightness] 57% of the sheet carries ink TONAL STEPS ## 4 families of tone. Every inked pixel's brightness in 64 bins, smoothed; each circled peak holds at least 4% of the ink. Life inside the black: 0.057 (under 0.045 reads as flat). FIVE READS ## Five reads, one answer. Each quality placed on its ladder by each read, and the mean the engine keeps. READ 1 READ 2 READ 3 READ 4 READ 5 MEAN Form 2 BUILT 2 BUILT 2 BUILT 2 BUILT 2 BUILT 2.0 Tonal depth 2 MODELLED 2 MODELLED 2 MODELLED 2 MODELLED 2 MODELLED 2.0 Layering 2 LEGIBLE 2 LEGIBLE 2 LEGIBLE 2 LEGIBLE 2 LEGIBLE 2.0 Composition 2 WORKING 2 WORKING 2 WORKING 2 WORKING 2 WORKING 2.0 Material and surface 2 SOUND 2 SOUND 2 SOUND 2 SOUND 2 SOUND 2.0 ### READ 1, IN ITS OWN WORDS “An ordinary, gestural sheet. A strong arc and modelled dark mass on the right, but a blunt, flat wedge at top left and a scattered empty field with stray blots keep it average.” Form · BUILT The central grey arc tapers fluently and the dark thrust has energy. The top-left slab and the right-edge dark mass are bulky and filled in. WEAKEST Blunt dark wedge slab at top left STRONGEST Grey sweeping arc tapering to a point at centre Tonal depth · MODELLED Modulation is 0.057 with four steps. The right mass shows grain and arcs inside. The top-left wedge is mostly flat, showing only faint texture in the stretched view. WEAKEST Top-left dark wedge is fairly uniform inside STRONGEST Right dark mass with grain, stepped greys and arcs Layering · LEGIBLE At right-centre the translucent grey arc and panels sit under the black thrust and the overlaps stay readable. Elsewhere passes mostly cover each other. WEAKEST Top-left slab is a single pass STRONGEST Grey arc under the dark thrust, right-centre Composition · WORKING The heavy right side and the curving arc set a direction. The left wedge is isolated, and the large lower-left paper with stray drips feels partly leftover. WEAKEST Scattered spatter in the empty lower-left field STRONGEST Arc sweeping from centre into the right mass Material and surface · SOUND The ink is controlled overall. Small drips and a grey smudge sit in the empty lower left, away from the principal masses. No tide lines are visible inside the darks. WEAKEST Stray blots and smudge at bottom left STRONGEST Dry-brush streaks and splash edges at right FLAWS ## 3 distinct places, 0 major. Each read must name every flaw and where it is, in a ninth of the sheet. Here the reads named flaws in 3 distinct places, 10 mentions in all across 5 reads; the number in each ninth is how many times a flaw was named there. Reads agreeing on a place strengthen the evidence for one flaw; they do not multiply it. GEOMETRY ## Measured from the 16-bit master. The previous engine (V22) measured this sheet's master file: 2 principal ink masses traced (cyan), 3 enclosed voids at true size in their grid cells (amber), the main gesture from start to end (red). Of 13 edge segments, 62% crisp, 23% soft or bloomed, 15% broken. The rating these readings produce, the rules applied and the arithmetic, with Peter's own rating where he gave one, are in [the Archive record](https://peteryuill.art/archive/works/T_172). ## Date 2026.04.03, day 96 of the Crucible Year, one of 13 paintings from that date (3 shown). 33 works were registered in the fourteen days before. Paintings are dated by the day their batch was registered and photographed; each was finished that day or within the few days before. Phase: [P1 Warm-up](https://peteryuill.art/phases/P1) (working title). THE YEAR ## T_172 among all 402 Every painting of the year by date; this one is outlined. [Every painting from 2026.04.03](https://peteryuill.art/days/2026-04-03) · [This date in the year](https://peteryuill.art/year?follow=2026-04-03) ## Materials - **Paper:** [Red Star Mo She Special Effect Xieyi Edition, raw](https://peteryuill.art/papers/S11), China Xuan Paper Co., Ltd., made 2025.12.08 - **Ink MB1:** [Kuretake Shogei Kiwami](https://peteryuill.art/inks/MB1), Kuretake - **Ink MB2:** [Yi De Ge Zhonghua](https://peteryuill.art/inks/MB2), Yi De Ge (Beijing) - **Ink MB3:** [Boku-Undo Bokkou](https://peteryuill.art/inks/MB3), Boku-Undo The sheet of paper was made 116 days before this painting. When each paper was in use [S1](https://peteryuill.art/papers/S1)[S2](https://peteryuill.art/papers/S2)[S3](https://peteryuill.art/papers/S3)[S4](https://peteryuill.art/papers/S4)[S5](https://peteryuill.art/papers/S5)[S6](https://peteryuill.art/papers/S6)[S7](https://peteryuill.art/papers/S7)[S8](https://peteryuill.art/papers/S8)[S9](https://peteryuill.art/papers/S9)[S10](https://peteryuill.art/papers/S10)[S11](https://peteryuill.art/papers/S11)[S12](https://peteryuill.art/papers/S12)[S13](https://peteryuill.art/papers/S13)[S14](https://peteryuill.art/papers/S14) Jan Feb Mar Apr May Jun Jul Aug Sep Oct ## Related From the same date · 2 Same paper and inks, other dates · 8 [Pattern V23 material and surface rung rose from 2026-05-24 on (rank-biserial +0.78, n 259)](https://peteryuill.art/oracle)[Pattern The floor of V23 Form rung raised in the later half of the practice (+2.30 SD, n 259)](https://peteryuill.art/oracle)[Pattern 45% of the variation in V23 Composition rung lies between batches (29 batches, n 259); with the month held constant 26%](https://peteryuill.art/oracle) [Previous T_166](https://peteryuill.art/works/T_166) [Back to all works](https://peteryuill.art/works) [Next T_179](https://peteryuill.art/works/T_179) ## Where next [T_164 same date, with 1 other](https://peteryuill.art/works/T_164)[T_179 the next shown painting in the sequence](https://peteryuill.art/works/T_179)[T_183 same paper and inks, 2026.04.08](https://peteryuill.art/works/T_183)[2026.04.03 13 paintings on this date](https://peteryuill.art/days/2026-04-03)[Paper S11 every work on it](https://peteryuill.art/papers/S11)