Sergio's  "drawings" are very process intensive. 

First, China ink is splattered and manipulated across the surface of the paper, both black and brown--- sometimes white acrylic is also introduced--- slowly shapes are manipulated along with the water into shapes and allowed to dry.

Later paint, markers and pencils are utilized to introduce or find shapes that will dictate what the ink  revealed or suggested.
Dibujos / Drawings.
Caiman
Papillon
Dragonfly
Chicharra
Crotalo Traslucido
Minotauro
Juntos
Colotl
Colotlan
Tecolotlan
Tatuaje I
Clauserg
Corazon Expuesto
Tempestad
Paisaje I
Naturaleza Muerta
Sueños Apropiados
Vestigios
Librtad
Monarca