The notebook that disappears — charcoal black on ivory, nothing performing.
The 823's flow is famously generous; Tomoe's extreme sizing keeps the river on the surface. A near-textbook match.
Medium on glass — comfortable, perhaps boring. A finer nib would have rated higher on this axis; we deduct points for fairness.
The whole reason the marriage exists. Tomoe pools just enough for any sheening ink to declare its second colour.
The 823 is soft, not flexed; sizing here is overkill for the line-variation modest it allows. Still very high.
Correspondence and journaling, contemplative hours — the temperament of pen and paper align without effort.
| Dry time | 38 seconds | Iroshizuku Tsuki-yo · M nib |
| Bleed-through | None | Verso · clean |
| Ghosting | Visible | Translucent paper — accepted |
| Feathering | Nil | 10× loupe · sharp |
| Show-through | Moderate | Single-sided recommended |
| Sheen observed | Pronounced | Copper · at the troughs |
| Shading | Excellent | Light–to–deep cobalt |
| Line crispness | 9 / 10 | No spread observed |
| Ink | Iroshizuku Tsuki-yo | — |
| Hour | 21:14 | Still |
| Lighting | 2700 K | Desk lamp |
| Temperature | 19 °C | Indoor |
| Humidity | 48 % RH | — |
| Angle | 30° | Sheen-visible |
| Hand | Right · posted · 55° | — |
| Pad of | Sheets 21–24 | Fresh pad |