the pdf is a guide for people who want kiln control and have several glaze ingredients that can be used experimentally to create unusual and heavily textured surfaces.
.The easy going approach spilled over into the whole area of surface treatment and removed the feeling that glazes could be overtired, under fired and go "wrong". In my my more expressive work it actually became more normal to look for and respond positively to "faults"and to enjoy the immense variety of activity that melting minerals can perform. A system of half and half , of 50/50, of equal volume quantities, spoons, cups, buckets, of many ingredients produced very interesting results.
Time for action------Take any earth material and mix fifty-/fifty with frit.
If you e mail me I wil send you a link