The painting I had planned to post today needs some more work on it, so I dug around and found another piece I did quite a few years ago as an example when I taught high school art. This technique is called tempera batik, involving tempera paint and india ink. After the painting is complete, india ink is brushed completely over the painting. After a day of drying, the ink is washed off leaving lines and a lovely texture on the paint. It always produced some strong student work.
For those of you who don't know me, in my former life I taught high school at The Walker School in Marietta, Ga for 28 years. It's a fabulous school with a rigorous curriculum, great students, faculty, staff, and parents. If you live near Marietta and are looking for a school for your children, please investigate it. Walker starts at pre-school and goes through high school.