“Kattie” is a poultice or drawing plaster. Good, soft birch bark is burned, placed immediately in water, and then chewed just as is done when they intend to use it for glueing stoneware pots. Then it is mixed with fresh spruce resin and worked with the hands into a black plaster. It is excellent for putting on hard boils etc., which then open very quickly and become soft quite painlessly.