BUTTERFLY - Glaze that lifts up and folds back during firing.
ca: RECOLLIT DE L'ESMALT - L’esmalt que s’aixeque i es separa durant l’enfornada.
es: RECOGIDO DEL ESMALTE - Esmalte que se levanta y se separa durante la hornada
Butterfly is when part of the glaze lifts up and folds back during firing, leaving a bare space showing the bisque.