I did these glaze tests for the Miro project about 3 months ago...! Thought I'd better document them before I stash them in a seconds box under the bed.
2, 3 and 4% Walker FW5601 Black (Cobalt Free) stain. All very, er, black. No problems there then.red is still a pain.
orange is lovely! Though I was rather sloppy when I glazed the test star.