I would like to thank to thank everyone that made Odd Mall happen at the John S Knight Center. From the maintenance people to the event people thank you. Please do not stop what you are doing. I would like to thank everyone who showed for their support of this event. My life has been made better just by attending. Thank you all we had a great time.
So you have a large piece that came out of a mold and it has a hair line crack. These are usually caused by pieces drying unevenly. The piece gets taken out of the mold and it is set on something soft so it will dry enough to stand upright. We use old pillows, but they do not allow air to dry the side it is resting on. Sometimes the piece warps to the dry side or it may crack due to the stress from uneven drying. This can be fixed, but it saves time to prevent this. Pay close attention as the piece sits and rotate to the unexposed side for a while.
To repair these cracks use a small paint brush and wet the area with water then drip and paint slip into the crack. It may take several passes as it dries, but it can be fixed. Use the brush or other tools to get a nice finish and let dry again. Repeat until you're happy.
Another problem you may find is air holes just under the surface of a piece's base. Mixing the slip before you pour to remove air helps eliminate these. If you find some holes they can be repaired the same way as cracks. It is easiest when the clay is wet green to make repairs because it does not crack like it does when it is dry. First: Open up the hole; Second: Put in some wet soupy clay; Finally: Follow up with some soft clay you can work with your fingers. By rubbing over the area with your fingers it helps pack the clay so it doesn't shrink, crack, and settle.
Remember wet green clay is the easiest to work when making repairs or modifying pieces. To see it up close and personal stop in and see or do a workshop. We would love to show you how. Here are some photos of a repair.
Here are some things you may see when firing the kiln. The first is not a 4 wheeler accident in the kiln, but what happens when a piece is poured heavy and is not all the way dry. The attachments sometimes do not drain if the slip is thick. The rest was dry but not the thick parts and they blew apart due to the moisture. The pieces do fly and damage other items in the kiln. The second image is what happens when glaze ends up on the kiln shelf. Yes, I was in a hurry and did not maintain the shelf. The piece broke off as the kiln cooled. There were two spots of glaze on the shelf where the cup was sitting. The stress was too much. The shelves have been cleaned and kiln wash applied. You have to chip the glaze off. I use a screw driver and small hammer. The small pin heads of glaze will cause things to stick to the shelve so get them all while you are there. Good to vacuum out the kiln while the shelves are out.