Naples Yellow (422)
This is a mix of Titanium White (PW6) and Chrome Antimony Titanate (PBr24) and is a beautiful semi-opaque yellow, much like sand at sunset. For sand normally I would use Titanium Buff, but that's not available in this range.
Bismuth Yellow (025)
This a pure pigment - Bismuth Vanadate (PY184), which is often found in Cad Yellow Hues in cheap student sets. It's a wonderful vivid near opaque yellow but I've never found a use for it.
Indigo (322)
This is faux-indigo, made of a mix of Phthalocyanine Blue (PB15), Carbon Black (PBk6) and Quinacridone Violet (PV19). The real thing is an extract of Indigofera tinctoria L. (the true indigo), which is costly to produce, so most denim products these days are stained with synthetic indigo, which would make a much more granulating paint.
Potter's Pink (537)
This is a very heavily granulating earth pink made of Chromium Tin Silicate (PR233) - this is a very hydrophobic pigment which is why it clumps so much - I will be interested to see if adding oxgall improves this and makes it a more useful colour.
Perylene Green (460)
This is very, very dark, staining green that is black in mass-tone. It is made of Paliogen Black (PBk31) - when diluted you can get a decent transparent dark green.
Sepia (609)
This is another faux colour as real Sepia is derived from the ink of members of the genus Sepia L. (cuttlefish), but this is a mixture of Carbon Black (PBk6) and Synthetic Iron Oxide (PR101). I think it might be useful for shadows in the evening sun as it has a lovely warmth to it.
You can see more about these colours in my Part I video for this challenge:


