Excerpts on using blend modes (from 'The Hidden Power of Blend Modes', 2012, Adobe Press)
http://www.peachpit.com/store/product.aspx?isbn=0321823761
I am not clear on what values are being used when the page refers to multiplying or dividing colors?
What happens when an RGB of (255,0,0) is multiplied by an RGB of (0,255,0) for example