Painting on top of photocopies: Using Karo syrup mixed with watercolors.

I add Karo syrup to my watercolor pan.  These are done on regular copy paper.  Once cured I varnish the pieces to eliminate stickiness.

My working setup.

my family 1957 Karo syrup and watercolor experiments

the Karo syrup acts as a slowing down agent when added to the watercolors.  This slowing process gives the colors time to gather and blend together.    The end effect is a very deeply saturated painting. This technique leaves a nice shine too.

The images are from my family album.