Pilot Iroshizuku Fuyu-gaki (“winter persimmon”) is a warm and readable orange ink with a little sheen and very little shading.

Scans

The scans look much more red-orange than it does to the eye. Iroful is a tad lighter than the other papers, but they are all orange.

Scan of an ink swatch card made from Col-o-ring paper Scan of an ink swatch card made from Iroful paper Scan of an ink swatch card made from MD paper
Swatch Card Scans. Click to enlarge.

Photos

The sheen is a bit odd on this one. On col-o-ring it’s barely there, only some gold around the edges. On Iroful there is small amount around the boundaries of heavy ink areas. However, on MD it’s quite heavy and changes from gold to more of a silvery color. It doesn’t show like that in the writing, so maybe it went down a bit too heavy when I swatched it.

Swatch Card Photos. Click to enlarge.

Microscope

The color under the microscope is a better representation of its general appearance. You can see a tiny amount of gold sheen around the edges of lines and more in the large swatches.

Ink under Magnification. Click to enlarge.

Chromatography

Scan of chromatography paper.
Chromatography strip scan

The chromatography fades into magenta and then yellow-orange with dark orange around the edges.

Photo of chromatography paper under UV light.
Chromatography strip photo under UV light

Under UV the magenta area glows bright yellow(‽) and the orange area glowed orange.

UV Check

Swatch Card Photos under visible and UV light. Click to enlarge.

Much to my surprise, it glows much more than expected under UV. Mostly different shades of orange with a couple areas being more red in the swatch, while the writing glows orange evenly. It’s not terribly bright, but it’s not subtle either.

Verdict

This was my first orange ink, purchased as part of a four-ink set of 30ml bottles of Iroshizuku inks. Before I used it, I wasn’t sure I’d even like orange inks, but surprisingly, I do! I’ve acquired a few other orange inks after this one, but this is still my favorite.

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