This week we’re going to take a look at Diamine Ruby. I bought this ink years ago when I came across a deal on Diamine inks. I don’t think I had a particular reason for choosing it other than I needed to purchase 4 bottles of ink. In the years since I acquired it, I have hardly used it at all. I wonder why that is? Let’s take a look and see what Diamine Ruby is all about.
Diamine Ruby
To start, let’s take a look at the ink itself. As you would expect from a ruby-colored ink, it is red. It is actually a fairly intense red color, almost what I’d consider to be a “pure” red. It’s really quite nice. It doesn’t have a lot of sheen or shading, but does have a bit of each. The shading really showed up with drier nibs and the sheen showed up with wetter nibs. The sheen isn’t the gold sheen that is typically associated with red ink, but instead is a nice dark edge varnish sheen that looks fantastic.
When exposed to water, this ink doesn’t have an interesting chromatography. It just gets a little lighter. Once dry, it is not very waterproof. You may be able to read what was written if an entire page got wet, but I wouldn’t count on it.
Dry time for this ink is fairly quick. It helps that it is not a super-saturated ink, which again is unusual for a red ink. Once dry, it will smear a bit but not very severely. It’s honestly pretty impressive for a red ink, as I feel that most bold reds I’ve used have smeared quite easily.
The Pens I Used
Each week I choose five different pens to fill with the ink I’m testing. My goal is to get a variety of nib sizes and styles, as well as a mix of modern and vintage pens. Here are the pens I chose this week and some writing samples from each:

Here are the pens I used this week (L-R): Jinhao 599, Vintage Pilot, Parker 51, Cross ATX, Lamy Studio
Jinhao 599 – F nib
This combo was probably the least exciting of the week, but it still looked good. The Jinhao nib isn’t wet enough to show off the sheen, but not dry enough to show off the shading. Still, I enjoyed writing and doodling with it.
Pilot (vintage) – F flex nib
This vintage Pilot has a very fine and very wet nib. I love the way the ink looked with this combo! I normally don’t enjoy fine nibs, but really liked writing with this one.
Parker 51 Demi (vintage) – M nib
This Parker nib is similar to the Jinhao in that it’s not super wet or dry. It was nice to write with, but not very special.
Cross ATX – M nib
Definitely my favorite combo of the week, this Cross nib is nice and wet and made this ink look great. I found myself writing and doodling with it more than any other pen this week.
Lamy Studio – B nib
I was surprised by this combo. I didn’t think that this Lamy nib was that dry, but it sure felt that way with this ink. Look how much shading it has!
Paper
On cheap paper, this ink bled through with all pens, but it wasn’t too extreme. I did see a bit of feathering with the wetter nibs. On fountain-pen-friendly paper, things fared much better. I didn’t see any bleedthrough or feathering with any of the pens. I think this ink should be safe to use on any decent paper.
Cleaning The Ink Out Of Pens
Here’s the true test for any red ink. How easy is it to get out of your pens? Thankfully, not very difficult! Of course, it does take a good amount of flushing before the water runs clear, but residual ink doesn’t remain in the pen like with some red inks. I feel like with other reds, even when the water runs clear, if I let the pen soak a bit with clean water more red always comes out. With this ink that didn’t happen. For the Parker 51 it took quite a while to get all of the ink out (which is common for that pen), so I would avoid using this ink in pens that are typically harder to clean. If you want to speed up the cleaning process, you can always use an ultrasonic cleaner.
Conclusions
After having this bottle of Diamine Ruby for so many years and never really using it, I am pleasantly surprised by how much I enjoyed using it this week. The rich red color accented by a darker sheen really looks great, especially in a wetter nib. In addition to that, it dries fairly quickly and isn’t a smudgy mess once it dries. Unfortunately, I think that I just have to accept the fact that I don’t love using red inks. What I do know is that if I want to use a red, this is probably the one that I’ll reach for.
Comments 6
I do like red inks, and Diamine has some fine red ink choices, I am currently enjoying Monaco Red.
Author
Diamine definitely has a good variety of red inks. That Monaco Red looks interesting!
Interesting, John.
Yes, red is not a favourite with me. I had some years-old Quink red and green, so I mixed them and the result was a lovely brown. Red and blue was another. It made nice colours, but proportions are important.
I like Diamine inks, but I’ll give this a miss. I wish I could doodle like you. Is it a result of misspent school days?
Author
Mixing inks definitely takes a bit of practice to get something that looks halfway decent. In my brief time experimenting with it I’ve had more misses than successes.
I never doodled in school and always took good notes. This is just something more recent as a way to use my pens but not having much to write about. As with anything, it takes a bit of practice and consistency, but try it out and you’ll start to see some improvement!
John, regarding mixing same brand inks. I use a dropper. If 2 drops of green and 1 of red gives me the colour I want then I have the proportions. I might add another red drop. Then I put the mixture in an empty cartridge to see how it looks in use.
I love reds. Will try this one!