finding turquoise

As the text on the left-hand page shows, my regular turquoise inks are water-soluble, smearing when watercolor is applied (whether I meant to or not — I did so accidentally here). I haven’t found a converter that works well for Kaweco Liliput fountain pens so I used turquoise inks that come in short international cartridges: Kaweco’s paradise blue and Graf Von Faber Castell deep sea green. (The smeared ink here is deep sea green.)

I did try mixing my own turquoise before using De Atramentis Document cyan with a touch of brown added; it made a nice color but not quite what I was after. Then yesterday I remembered having a sample of Document yellow from Goulet Pens. I tried adding drops of this to the cyan (now called turquoise on the label but still on the blue side) and am very pleased with the resulting color — not too blue, and not yet green. For now I put it in this Pilot Metro fountain pen because I had made enough mess for one day. Refilling empty short cartridges with a syringe works but I haven’t found a way to do so neatly.