Recently I posted a Trois Crayon drawing of Helen of Wales, Trois Crayon is a traditional drawing technique using three coloured chalks: red (sanguine), black, and white. The paper used is a mid-tone and can be grey, blue, or tan. The temperature of the sanguine is very important and must be matched to the cool or warm colour of the paper. Conte make three distinct sanguine’s so you can match them to the plethora of papers available. Also Cornelissen sell genuine lump sanguine.
When trois crayon is mentioned usually the French painter Antoine Watteau comes to mind. He loved drawing with sanguine thinking of his drawings as “pensees a la sanguine” = thoughts with the blood one.