When I first bought my fountain pen, I started a small “ink review” notebook. I wasn’t happy with it though. I just wanted a simple page with a small sample of writing and if I liked or disliked the color.
I found such a page template online. It includes spaces for ink brand and name, pen and nib used, and a writing sample. Exactly what I wanted.
I still have all the ink from the samples I ordered from Goulet Pens that I can put in the journal. The only ink that I’ve used and don’t have more of is the Lamy blue that came with my Safari. I really don’t care though, as I didn’t like the ink at all. It was a very boring and ugly blue.