[Tony Pro]

The glaze technique is actually a color theory I employ called "Optical Red" and "Optical Blue"....

I gave a description of this a year or so ago on this site.

It's actually not a glaze technique at all... I don't use glazes. If you see an original of mine, you will notice that it's thick paint.

When you light flesh with warm light, it 'radiates' a warm reflection of light and to interpret it into paint I use red as a hallation effect. It also works in reverse in cool light, I use Ultramarine or Viridian or a combination of both to give a felling of a glow or halo effect.

Think of light as a bucket of water. If you throw a bucket of water on a form, some water will bounce back if you watch it in slow motion. The 'bounce back' is a reflection of water and light behaves the same way.

Sargent used this as well as Sorolla.

Hope I didn't completely confuse you!
Tony