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wheel transparency Kosvanec: to make more transparent watercolors

During the summer courses of the 2010 CIAM I spoke of the idea of \u200b\u200b"brightness and transparency of watercolor painting. As promised, now offers information on the blog.
We know that you can do with watercolor works sublimely bright! And, do not miss this quality of watercolor, we must understand the "character" of the pigment, that is the color.
To simplify the concept of transparency, the American painter Kosvanec Jim has created a wheel to help to use the watercolor pigments that allow you to keep this light.
This wheel has five wheels ranging from those of more tranparent than the less transparent colors:
Before wheel: transparent color and coverage without : Permanent Rose, Rose Madder, aureolino yellow, cobalt blue, hooker Veridian green and green. These colors mixed together Mantega their transparency; So if you want a transparent orange, you can use the Rose Madder or Permanent Rose with yellow aureolino.
Second wheel: semi-transparent color and coverage without : magenta, red work, vermillon, burnt sienna, burnt sienna natural, new Cambodia (yellow), green sap, antwerp blue, cyan blue, Prussian blue , permanent mauve. These colors can be mixed as transparent colors but with less effect of luminosity.
Third wheel: tranparent color with opacity: alizarin red, carmine red, red, windsor, thali red, yellow, permanent yellow windsor, phtalo green, phtalo indanthrone blue blue, purple, purple permanent windsor. These colors mix well together. The effect of these colors is strong on watercolor paper.
Fourth wheel: semi-opaque and opaque colors: cobalt violet, cadmium so all the red, yellow and orange, green, cobalt, turquoise blue, manganese blue, blue Cerulo, French ultramarine blue, ultramarine violet. These colors can be mixed with those of the third wheel. We understand that a watercolor done only with these colors will lose its brightness.
Fifth wheel: conteneti colors white and black : indigo blue, Payne's Grey, green earth, Davy's gray, Naples yellow, sepia, yellow ocher, brown Madder, March purple, purple Grey. These colors are used sparingly in watercolor.
Conclusion: With the use of watercolor loved the colors in the first three wheels to maintain the transparency of the work.
Which color to paint?
I suggest 6 essential colors: a red a yellow and transparent blue and a red, yellow and blue with opacity ( third wheel).
fun.
L. Giannetti
CIAM