While entering the description of a drawing that will be in our August 1st sale at Clarke Auction, ClarkeNY.com, I came across the word sanguine. It was jotted down post artist's name by colleague in semi-sloppy handwriting and being unaware of the meaning I was unsure of whether this was a continuation of the name, location, description, etc. So what other choice does a girl have but to Google it!
Come to find out it's a particular type of chalk which is reddish-brown in color and used primarily for sketches. It's also similar in texture to charcoal or pastel and requires a fixative to prevent any unwanted smudging.
Here is an example of a sanguine sketch:
Leonardo da Vinci's Self Portrait.