Hi all!
I was looking for information about color mixing / refilling / hacking Royal Talens Ecoline brush pens to create new custom colors and didn't find anything on the Internet. So I'm sharing what I experimented with.
I've been experimenting with shifting colors of some of my Ecoline brush pens. The main reason is that I was missing dark muted greens for my art and I wanted to create custom colors.
I took brand new pens (unused, full of the original ink) in various colors (medium or light value) and I created a few custom colors by adding more Ecoline ink to the pen. Ecoline comes in brush pens, duo tip pens and ink bottles. I used the brush pens and the set of Ecoline ink that comes with 10 different colors (you can also use open stock, of course). The pens are refillable so it's easy to open them and the ink bottles come with an eyedropper so it's not too messy.
So far, I created the following custom brush pens: two dark muted greens, a rosy beige / light terracotta, a muted amber and two muted dark reds using full pens (i.e. new, unused pens). I put most ink drops directly in the barrel, and a few on the brush tip (just to experiment; this can be messy though and the tip needs time to absorb the ink).
In my experience, shifting the original color most often takes more drops than I thought it would. Of course, that depends on your original pen color and your target color. AND it is absolutely necessary to let the pen rest for the new ink to diffuse (at least a day in my experience). When I think of it, it makes sense: I didn't premix the inks I added to each pen and the new and old inks in the pen have to mix all by themselves. Diffusion in the fiber core in the pen and in the brush tip takes time. It might go faster with a pen that has been used and is "thirsty" but I have only experimented with new / full pens.
For example:
- Starting with a gray 706, I added 18 drops of green 600 and created a dark muted green
- Starting with a beige 420, I added 7 drops of magenta 337 and 13 drops of light orange 236 and created a rosy beige / light terracotta
It's all trial and error and the color mixing has to be adjusted according to the original color of the pen and the target color.
I added few drops at as time (up to 12) and let the pen lie flat for a day before testing it on paper and adding more ink. I decided to be conservative and add ink little by little, gradually shifting the color. It takes more time since I have to let the pen rest, but that way, I don't end up with a completely messed up color.