Want to learn more about how this was done? Check back next month for the explanation.
ANSWER TO MYSTERY TECHNIQUE #23: This is an example of paper marbling. First I prepared the paper with alum and let it dry. I then used straw whisks to drop many layers of watercolor paint onto the surface of a mixture of carragheenan and water in a large tray. Drops of Spirits of Soap created the ghostly white edges. Transferring the image to the paper was the trickiest part.
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