“Raku Halo” affect is what I call this. The black lines have a brilliant copper halo. This is an affect which does not reliably occur. It’s loosely based on the work of Paul Soldner, the Father of American Raku. He describes the affect here: paulsoldnercom/essays/Romancing_10.html
” Most potters are too insecure to let fire decorate their work. They want to control and dominate it. I have spent considerable time in my life trying to learn the secrets of fire and only recently have started to pin it down.
For instance, when people saw the “halo” effect on some of my raku pots, they would ask how I got it. I would have to be perfectly honest and tell them that maybe it was the borax in the glaze or slip, or I would invent other maybes to explain why it happened.
One day I pulled a pot out of the kiln. Hoping to get the halo, I put the pot in a can to smoke it. When I lifted the lid, the halo wasn’t there. So I put the lid back on carelessly and lost interest in it.
When I opened the lid later, the pot was cold, and the halo line had developed!
I finally understood that the halo is not part of the glazing, the slip, the firing, or the smoking. After all that process, the pot must be re-oxidized and, for reasons I still can’t explain fully, but feel it probably has something to do with the heat conduction of copper, the oxygen burns away a portion of the smoke, leaving a strong white line around the decoration.” ~ Paul Soldner
Soldner’s raku halo then is white. The raku halo affect you see in this photo is copper metallic. I love that Soldner speaks to a time period when he said “…he’d invent other maybes to explain why it happened.” So now I must say the same thing! At this point I’d be making educated guesses as to the how it happens.
I just know….for sure…that I love it when it DOES happen! For me, it’s like an additional kiss of the fire!
Raku halo affect occurs with serendipity and makes the piece very special in my opinion!