The link above will take you to an interview titled: Separate/Together, Wolf Kahn and Emily Mason. I haven't read or seen enough about EM, or Cecily Kahn for that matter. In this interview, Kahn reveals some insight on the second generation of Abstract Expressionism and intuitive process, and about having an inherent color sense.
Read Lin Wang's blog post, The Dust on Butterflies' Wings-Wolf Kahn in Pastels. It is about the occasion of Kahn's installation at The Hoyt Institute of Fine Art. BTW, this is an interesting blog to read in general.