I chose dramatic red and purple etching ink for my print Desert Storm. It was made using the the drypoint and carborundum technique, where lines are engraved into a metal plate with a steel needle, and areas that are meant to print dark are covered with a mixture of acrylic medium and fine carborundum powder. The powder holds a lot of etching ink.
Caligo waterbased etching ink
on Fabriano Rosaspina etching paper. 2010.