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Summary: For a Santa Fe style pot, clay compression reduces the possibility of air bubbles and cracks. See how to compress clay for pot making 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
"From here you want to start boring out with our thumbs; what I'm doing, I'm coming down and I'm pressing it out. And what that does; we're going to go and establish how thick we want it down on the bottom and then my pinky's letting my thumbs know that that's about as far as I want to go. Take your needle tool; no matter how cool you are you can always go by and double check yourself; sometimes your wrong like I was, I can go down a little bit further. So let's; you don't want to go down to far and you don't want a paper thin bottom, I'll check it; yep that's good. Alright so what I'm doing here; I'm just compressing the bottom to ensure I don't get any S cracks, so that is important when you're throwing off of a bat but when you; as opposed to throwing off of the hump you know you have to keep compressing, alright. So what I'm doing here is just squeezing it in; centering it all up, it wants to get off center but I'm not it. I'm just squeezing it and then flattening the bottom so I've establishing the bottom; the side walls and now we're ready to rip it up, bring it in."
eHow Article: Santa Fe Style Pot Clay Compression