Archive for January, 2017

  • Craft

    Orton vs. Chinese Cones

    Well, that didn’t work out.  The kiln master ended up over-firing, past Chinese cone 10.  Orton cone 12 probably dropped around Chinese cone 8/9.  Looking forward to doing a better test in my own kiln.

  • Techniques

    Low-fire Electric Kiln

    I’ve finally gotten a new low-fire electric kiln.  This kiln is designed to fire up to 1000°C, so it’s useful only for on-glaze enamels and bisque.  Total cost was 2900RMB, which is about $420USD.

    The kiln uses 45cm X 50cm shelves, a common size here.

    Elements are also snaked through the bottom of the kiln, on top of which are placed bricks.

    Single K-type thermocouple placed in the middle of the kiln.

    Locking wheels, really handy.

    Control box.

    Element connectors

    Spring door.

  • Techniques

    Slow drying

    I have a couple “wet boxes”.  These are plastic bins with lids into which a layer of plaster has been poured.  The plaster is kept wet in order to maintain humidty, slowing (if not stopping) the drying process.

    However, I haven’t used the wet boxes in a long time.  I’ve found it much easier and more convenient to simply wrap each piece in it’s own plastic trash bag.  Pieces stored in this manner can be trimmed weeks or even months later.

    Ware placed on MDF bats and wrapped in plastic trash bags.

    Ware is placed mouth-down on an MDF board to prevent warping. The boards mold easily, alternatively only wrap the ware.

    After two months the ware is still wet, although the moisture is now distributed more uniformly.

    Bags of clay are double-bagged in large heavy-duty plastic bags. A piece of soaked plaster is placed in the bottom of the bag.