In her travel sketchbook, the artist, Katherine Tyrrell, works plein air with colored pencils. She makes a large thumbnail plan before she begins in her sketchbook. In this way she can mark values, hatching with long lines, and make decisions about color (as the light changes). Contemporary.

The artist's travel sketchbook provides plans for finished drawings and paintings, and are independent as well.

Colored pencils and mechanical pencil.

Artist: Katherine Tyrrell.

More information here (Tyrrell's blog and website).