ash glaze

fireplace ash & washing ash: http://www.potters.org/subject71545.htm

washing ash method: http://www.potters.org/subject00717.htm

reliable ash glaze base and pecan hull: http://www.potters.org/subject00716.htm

ash glaze recipe, including simplest one, half ash half clay:
http://www.potters.org/subject00714.htm

human ash, etc http://www.potters.org/SEARCH.ASP?QU=ash+glaze&titleorbody=title&maximumResults=50