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Summary: Compressing the bottom of a ceramic olive oil bottle eliminates S cracks. Learn how to compress clay for bottles with tips from a master potter in this free ceramics video.
Chris Cook received a BFA in ceramics and sculpture from Southern Oregon University where he studied raku, studio ceramics, stoneware, and various firing techniques under Jim Romberg....read more
"Alright we're going to let the show bottle set up; these guys are setting up, I'm going to make an olive oil bottle now. It's going to be a littler bigger; a little taller. This is a traditional way of making olive oil bottles; the British do them but I'm not really into the way they make them so I'm going to make my own. And it's definitely done in the loose form of the Sugar Rocky Potters of Japan who perfect imperfect things. So let's see if we can make this thing perfectly imperfect. I just plunged and now I'm; once again I'm widening the rim, I'm widening the bottom establishing the side walls and rolling my thumb down and down the, the middle compressing the bottom of this piece. So I went in, out, established side walls and then used my thumbs to compress the bottom all in one motion, side walls established. I gouged my hole and my bottoms compressed, now I'm ready to throw this bottle."
eHow Article: Ceramic Olive Oil Bottle Compression