Hi Bruce, I have heard of Quiller's colour theory only peripherally so have not had the chance to look at any of it in detail before so it's nice to see this palette, thanks. Even on first inspection I can see some obvious flaws if this is intended as a general working palette, are these the actual colours he recommends? First off there it is far
too weighted in the orange-to-red arc of the spectrum (Cad Orange to Quin Magenta - five of only 12 colours?!) Then there are two MIXED greens in place of any single-pigment greens? Sheesh!
Purely in terms of available mixed hues I guarantee that the right two yellows, two reds and two blues would be more versatile than this, even without an added green and violet. There has been a fair bit of discussion on this in this forum and elsewhere here over the past few months if you want to check back.
To go through these in detail (assuming you want to stick to Golden exclusively):
There is only one yellow, and a light-valued, green-biased one at that (hence why one needs a pigment orange as this won't allow bright mixed oranges). If you want a single yellow you really should have one as saturated as possible so a middle yellow would be much better simply from the point of view of mixing the widest range of colours. If you want to stick to a single yellow, Hansa Yellow Medium or C.P. Cadmium Yellow Medium would be better, depending on whether you want it to be transparent or opaque respectively. But a better choice would be one green-yellow and one orange-yellow, in which case either of the two above plus Hansa Yellow Light.
Cadmium Red-Orange (more-commonly called Cadmium Red Light) AND Cadmium Red Medium? These two colours are very similar and are in many respects interchangeable. If you want to save the money and skip the cad orange (and save the hefty pricetag on two cadmium colours) C.P. Cadmium Red Light is probably the better bet, although Golden's is not as orange or as high in chroma as some. You will be able to mix a very respectable hue of cadmium orange with this and C.P. Cadmium Yellow Medium for example.
Now to the two quins. Quinacridone Crimson is not an accepted name for a member of this family (Golden offer this but it is a mix of a magenta and maroon, PR206 and PR202) so he is either referring to this or... On general principle a single-pigment colour is always a better bet and Golden's Quinacridone Magenta is a fine colour so go with this.
Dioxazine Purple is not an essential colour by any means. It is also not offered by Golden and a mix of Quinacridone Magenta and Ultramarine would yield a pretty similar result, certainly close enough for most real uses. If you do want a substitute the only other option is Ultramarine Violet, a nearly identical hue, which is arguably the best blue-violet anyway. Golden's appears a little weak on the hand-painted colour chart but this should make it slightly easier to control than Dioxazine Purple, which can be overpowering in mixes.
Ultramarine Blue is a must-have for most people, the most violet-biased blue and Golden's looks particularly good. Makes a great range of bright mixed violets with a red-violet like Quinacridone Magenta.
Phthalo Blue is too vague as there are two distinct versions, the green and red shades. The green shade is the one to get as this makes a good pair with Ultramarine, mixing very good greens.
Phthalo Turquoise instead of one of the phthalo greens I find hard to fathom, especially since Phthalo Green BS is probably the best pigment green, bar none. Although Phthalo Turquoise is actually a single-pigment colour many people offer a mix of blue and green instead and Golden are no exception. Go with Phthalo Green (Blue Shade).
Permanent Green Deep and Permanent Green Light are really odd as these names refer to wildly different colours from different people. I would stick to just Phthalo Green (Blue Shade) unless you do a lot of landscape work.
Well that's it, hope this helps. If you have any questions or want any clarifications on the above, just shoot.
Some links on colour theory you might like to check out:
<A HREF=http://www.handprint.com/HP/WCL/color3.html>colour psychology</A>;
<A HREF=http://www.handprint.com/HP/WCL/color4.html>colour wheels</A>;
<A HREF=http://www.handprint.com/HP/WCL/color7.html>an artist's color wheel</A>;
<A HREF=http://www.handprint.com/HP/WCL/color11.html>exploring a paint wheel</A> and
<A HREF=http://www.handprint.com/HP/WCL/tech34.html>mixing green</A>.
P.S. Great name BTW, hope you're wearing the right trousers