I was asked a few questions about my technique. Hmmmm. Well I do use a new brush for each new color. I think that helps in laying down the first broad colors. But after the colors are all down my brushes no longer stay free of mixtures. I use different brushes that I have just collected over the years. I like the blue handled watercolor brushes from Utrecht, and I also use Utrecht paint. I also use the white synthetic flat brushes (the longer, and softer, the bristles the better). In order to get the "right" color, I isolate that color by looking through a hole punched through a 2"x2" square piece of gray cardstock. Once that color is isolated, it is so much easier to mix that color. I don't really know what more to say about my technique except that I am still trying to figure it out too.