I've had a few goes at doing colour swatches for my watercolours over the last couple of years. I think I got the idea from Jen Dixon. I was never really 100% happy with them, and they've never been particularly easy to use or refer back to, so a few months ago I started trying something a little different, to see if that would make things better. Then, life got in the way, as it does, and it never got any further than a bit more experimenting.
The other day, I spotted @wilfreeborn (who I found in an article in Artists & Illustrators magazine and who has been a massive source of inspiration since I started following him on instagram) swatching his 2018 palette on his instagram stories, and then found his post about it, and it reminded me of that thing I started to do some months ago and then never took any further.
I got my pencils and ruler out and made a bit of a chart, then went over it with my pigment fineliners, so the ink wouldn't wash away or spread when I put the paints and water over the top. I drew a bar a quarter of the way across the box so I could tell where each paint was on the opaque to transparent scale. Once I'd done that, I realised I wanted one sheet for each group of colours, and, since we had a shiny new multifunction printer, wondered if I could photocopy each sheet onto watercolour paper, so I wouldn't need to draw each one out by hand. Miraculously, it worked, and it turns out my printer comes with archival ink by default. Bonus!
This morning, I found those photocopied sheets and decided to dig out all my paints and get started. I wrote the colour name at the top (in fancy calligraphy, because I felt like it) and set about swatching all the yellows I could find.
Then, when I was taking a picture of it to post online, I thought that if I found this useful, then others might, and so I wandered over to the computer and made a quick wee PDF.
Now, as I've mentioned above, I'm lucky in that I have a printer that can be fed heavier paper (up to and including 300gsm watercolour paper) and uses archival ink by default (so it doesn't go funny when I put water on it). You might not have the same, but if you're having trouble with the ink going funny when you print it, you could use the template as a guide and trace or copy from it using a pigment ink pen.
So without further ado, have at it!