Today's vintage ink is Sanford Pen-It Cardinal Red. This ink was popular in the 1930's and 40's. A sample of this ink was provided by John from Fountain Pen Love.
Cardinal Red is now a pink. Originally it was a bright red.
In large swabs there is a little bit of bright greenish gold sheen around the edges. This ink really has degraded to a pink instead of a red. This ink was incredibly hard to capture correctly in photographs.
Let's take a look at how the ink behaves on fountain pen friendly papers: Rhodia, Tomoe River, and Leuchtturm.
Dry time: 30 seconds
Water resistance: Low
Show through: Medium
On 24 pound Staples copy paper the ink feathered and bled a bit.
Ink swabs for comparison, left to right (top to bottom for mobile RSS): Skrip Permanent Red, Sanford Pen-It Cardinal Red, and Diamine Scarlet. Cardinal Red and Permanent Red show similar color degradation.
I used a broad Pilot Vanishing Point Crimson Sunrise on Tomoe River paper. The ink had an average flow.
Overall, it's really more of a pink than a red, but I think that's from the ink degrading over time. It shows similar color degradation to Sheaffer Skrip Permanent Red. It still behaves well, and didn't have any flow issues, the color is just more pink than it used to be.
Disclaimer: A sample of this ink was donated for the purpose of this review. All photos and opinions are my own. There are no affiliate links on this page.