k baxter packwood April 18, 2006 Black Gutta gone wrong k baxter packwood April 18, 2006 Gone very wrong to be exact, it's Pebeo's black gutta that never really sat up right, which leads me to suspect that it has a short shelf life. I recouped the piece, barely. I'll add more colors to it later. Madder-Lac, Cochineal, Indigo.