July 17, 2009, Newsletter Issue #353: Drying
Tip of the Week
It is important not to dry your molds too fast. Store them on slated shelves so that the natural air can circulate around them.
When buying a new mold be sure you always open it immediately to inspect the inside for any damage.
When cleaning the inside of a mold, never use anything other than a brush. If you encounter a stubborn piece of clay simply roll some waste clay into a ball and pounce it off.
Since molds work on the principle of absorption, it is important that you avoid touching the inside with your fingers. You do not want to leave any oil residue that may clog pores.
Be sure that you remove all dried clay from the seam area of a mold. It can dry and when you put the mold back together and start pouring again, the dried clay may warp the mold and eventually cause rust spots on your molds.
You may notice a fuzz on your molds when they are being sorted. This fuzz is caused by deflocculents in the slip that have penetrated the mold. You should remove this fuzz as it will harden and plug the pores of the mold.
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