The Derwent Blending Pens look like any ordinary marker type pen that you may use, one sports a slim barrel and the other a slightly thicker barrel. Inside the barrels is filled a solution similar to odourless mineral spirits, allowing for the artist to simply remove the pen cap and gently mix or blend the colored pencil pigment with the blender pen nibs. The thicker pen has a wider, more felt type nib, this allows you to cover larger areas in a faster time, whereas the smaller pen sports a much thinner nib, allowing you to apply the same principle in more finer detailed areas.
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