Ink Swatch - Diamine - Sapphire Blue

Diamine Sapphire Blue is a blue ink that leans toward the purple side, or blurple. It has gold sheen and some shading.

The gold sheen might suggest this is Sapphire in the Lapis lazuli sense instead of the Corundum variety.

Scans

Unlike a lot of other inks, this one gets darker on Iroful compared to col-o-ring and MD, and it shades more readily on Iroful as well.

Swatch Card Scans. Click to enlarge.

Photos

The gold sheen is quite prominent on all three cards, but it doesn’t show much if at all in writing.

Swatch Card Photos. Click to enlarge.

Microscope

The sheen is only slightly visible in the writing along the edges. On Col-o-ring and MD it seems to be lighter in the background between fibers, while on Iroful it’s very even all over.

Ink under Magnification. Click to enlarge.

Chromatography

Chromatography strip scan

The chromatography starts purple then changes to cyan and then dark blue at the leading edge.

Chromatography strip photo under UV light

There is a very dull glow from the purple section and then a hint of bright blue just past the leading edge in one spot.

UV Check

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

It doesn’t look like much, but it is glowing a small amount.

Verdict

This may be my favorite ink! It’s my favorite color, it is well-behaved in every way, and I’ve never had any problems with it in any pen. I keep this ink in multiple pens all the time.

It is a little on the dry side, so it also helps keep EF lines extra thin and crisp on many different types of paper.

I also like that it has gold sheen instead of red sheen like so many other blue inks.