-Basic enameling materials listed in my Intro To Enameling tutorial
-Something to draw your design with:
Pen with liquid ink. You'll want to pick something that draws a fairly thick line of liquid ink and doesn't dry too quickly.
Brush and squeegee oil or A-5 oil. These are special oils made for enameling- available from enamel supply companies like Thompson Enamel
A-5 oil marking pen. This is a special ball point pen filled with A-5 oil. It is very convenient for this technique. Also available from enamel supply companies.
-Start by firing a layer of counter enamel on the back of your piece. Then fire a base coat on the front. You might need two or three coats to get a smooth surface and consistent color.
-Use your pen or brush and oil to apply a linear design to the fired enamel. Immediately sift a thin layer of a contrasting color over the design. Pick up the piece and carefully tap off the excess enamel powder. The enamel should stick to the wet ink or oil, and fall off everywhere else.
-Dry the piece thoroughly and fire it in the kiln or with your torch. Try experimenting with different types of pens and brushes to get different line qualities. You can also overlap multiple layer of designs or combine with sgraffito or stencils.