Blue Chaco transfer paper is a tool I have discovered for watercolor painting. It is a tracing paper that leaves a blue line that disappears when it becomes wet. This is ideal when I don’t want to leave a visable “outline” to my painting. I have this a supply to bring to some of my classes. I especially use it when I am aiming for correct perspective or likeness to my reference photo. Give it a try and let me know what you think. You can find it at our local art supply store, The Art Location located at 1905 E. Mission Blvd. in Fayetteville Ar. or you can order it online through a google search.