Re:clay and grading
- I have to agree, a child would have to be working pretty thick and lack technical skills to create an air bubble (i teach my students about wedging and working thin to prevent this.) and that most blowups are due to rushing them to the bisque fire and not letting them dry thoroughly. you can tell how dry a piece is 1-its not the same color, dark grey and light grey areas. 2-wet clay is colder than dry clay. I encourage my students to work thin-to conserve clay and reduce blowups, i may have one or two pieces a year that this happens to(not bad for 475 students!)
hope this helps!
--- In firstname.lastname@example.org, Gayle Parent <gayleparent@...> wrote:
> In recent years I have heard from several sources that most projects that "blow up" in the kiln do so because there is moisture still in the clay, more than due to air bubbles. Anyone agree or disagree? I have several years of experience with clay, but I'm not a clay specialist. Could we hear from some high school ceramics teachers?