Did a Raku firing the other day 3 horse hair pieces sprayed with ferric chloride while still hot.

 This piece was Raku fired with horse hair and turkey feathers. It was sprayed with Ferric chloride while still very hot. This piece was fired several times. the first two as black and white smoke pieces. the last as a horse hair piece. This time it sustained several almost invisible fractures that were reenforced with brass rivets.

Kintsugi  http://en.wikipedia.org/wiki/Kintsugi