Make Ink: Red Geraniums

I'm getting ready to go out of town for a few days (big wedding!), and the geraniums begged to be dead headed before I left.  The heat we are expecting this weekend may kill my plants anyway... What a nice way to preserve some colour:

After cooking it down, I brushed some of the liquid on watercolour paper. You can see the green peeking thru from the back.  I then added vinegar to the water and cooked it down some more to remove about half of the liquid:

This ink blob was on mixed media paper: