Ink Review #1620: Robert Oster Cult Blue

Today’s ink is Robert Oster Cult Blue, a Cult Pens exclusive ink. Thanks to Cult Pens for sending this ink over for review!

The Color:

Cult Blue is a blue-black with a strong purple undertone.

Swabs:

In large swabs on Tomoe River paper there is some bronze sheen.

Writing samples:

Let's take a look at how the ink behaves on fountain pen friendly papers: Rhodia, Tomoe River, and Leuchtturm.

Dry time: 40 seconds

Water resistance: Low

Feathering: None

Show through: Medium

Bleeding: None

Other properties: low shading, tiny bronze sheen, and no shimmer. There is some shading there, but it’s very subtle so I would call it low rather than medium.

On Walmart 20lb copy paper there was just a little bit of feathering and bleeding.

Comparison Swabs:

Cult Blue is a little less saturated than Robert Oster Blue Black. Click here to see the Robert Oster inks together, and click here to see the blue black inks together.

Longer writing:

I used a TWSBI Mini Rose Gold with a medium nib on a Taroko Odyssey notebook. The ink had an average flow.

Overall, I enjoyed this ink. It is similar to Robert Oster Blue Black, so unless your are an ink addict you probably don’t need both.

Disclaimer: This ink was provided by Cult Pens for the purpose of this review. All photos and opinions are my own. This page does not contain affiliate links and this post is not sponsored.