I have another ink to show off. I had this bottle of Robert Oster ink sitting in my queue waiting for some action. I can’t tell you how many bottles of blue ink I have in various shades and tones. Let’s just say I have a lot! I’m sure some of you are in the same boat.
This one particular blue ink color has really caught my attention. It’s called Midnight Sapphire! I think this would be perfect for an everyday blue color. It’s vibrant and has a bit of character.
Here’s my writing sample and swatch. I have my lovely and beautiful Turnt Pen Co Pynchon PM4 pen filled with this gorgeous blue ink.

Midnight Sapphire is a dark blue ink that leans a bit towards purple. When touched with water, this ink color leaves behind a pinkish undertone depending on the paper used. It has some lovely shading and a bit of sheen. I’m trying to figure out the sheen that I’m seeing. Depending on the angle of my swatch card and lighting, I can see a dull copper-pink sheen along the edges.
This ink would be lovely to use in a pen & ink wash sketch. It feels a bit on the wet side. You can see from my mini swatch to the left of my swatch card how well the color pulls across the paper with water. I know my fellow workshop friends will understand and enjoy this bit of information.
My Turnt pen has fast become my favorite writing pen. It now has a slight edge over my Franklin-Christoph pens and closing in behind my Esterbrook Estie pens. I have to admit I keep twirling this pen and enjoy seeing all the lovely colors.
Pen: Turnt Pen Co Pynchon in Primary Manipulation 4 with Franklin-Christoph #6 HPS Fine nib
Ink: Robert Oster Midnight Sapphire
Paper: Rhodia Swatch card: Col-o-ring