Testing Fountain Pen Inks

Question: has anyone done extensive testing on any fountain pen inks?

I don’t mean the standard Mountain of Ink style, sample card, writing sample, etc. visual comparisons. (I’d like to call this subjective measurement, but chromatographic measurements aren’t subjective if done in a controlled manner.)

I am thinking more objective testing: viscosity, density, flow rate @ a given line width, etc.

I was thinking about this type of testing tonight, and it seems to me that there are a lot of factors that would need to be controlled: temperature, air pressure / barometric pressure, nib consistency, friction (aka heat), etc. Given what I was thinking this could be an interesting experiment, if someone wanted to undertake controlling all the variables, and implementing the controls necessary for consistent results.

From #ContainerDays London to Barcelona: big thanks to the #DevOps BCN #Meetup for having me!

I revisited my talk on moving beyond imperative #Docker builds toward #Declarative, #Reproducible and #Secure #OCI #Containers with #Nix:
Hermetic, network-isolated builds, clearer dependency graphs, better layer reuse across images, and a stronger supply-chain story (#SBOM + #SLSA provenance).

Slides, transcript and more information at my website: https://www.arik-grahl.de/talks/devops-bcn-february-2026

Photography by @robertspang

#ContainerDays London was great!
Thank you for the interesting talks and inspiring exchange.

I will give my talk "Beyond #Docker Builds: #Declarative, #Reproducible and #Secure #OCI #Containers with #Nix" once again next week, on February 19th at the #DevOps #Meetup in Barcelona.

https://www.arik-grahl.de/talks/devops-bcn-february-2026/

There are still a few seats available: https://www.meetup.com/devops-bcn-group/events/312852703

What a great first day at #ContainerDays London.

Looking forward to see you tomorrow at 09:40 at my talk "Beyond #Docker Builds: #Declarative, #Reproducible and #Secure #OCI #Containers with #Nix".

https://www.arik-grahl.de/talks/container-days-london-2026/

#CDSLondon