Raku : a process by which pottery is fired at a relatively low temperature and then moved while hot to a closed container with combustible materials ( as paper or sawdust) that ignite and cause a reaction creating colors and patterns in the pottery’s surface.
Origin of RAKU
Japanese, literally, pleasure; from the use of the character for this word on a seal given to the family of the potter who introduced the style. First known use 1875
On Sunday in support of the local artesian pottery guild, we ventured out to our first Hot Shrimp Boil and RAKU. All proceeds went to the support of the Tennessee Valley Ceramics Art Guild (TVCAG) or as it will soon be known (new name and logo) Earth Spin and Fire.
While my husband “B” enjoyed the comforts of the air conditioned studio and the hot shrimp boil, my mother, daughter and I proceeded to claim and purchase our pots, which had all been thrown and donated by local artist who are members of the guild.
Step one: Pick out pot
Mom and I picked out pots which were relatively the same size, but different in texture. The kid picked out a pig. For all who know us, guess what song immediately jumped into my head (favorite kids show…pig that is into everything and acts just like our DAUGHTER!)
Step two: Pick out glaze and paint pot.
We had a choice of several different glaze medians to include silver, dark metallic, bumpy light blue (which created an orange peel effect), dark blue metallic and a mystery color simply labeled mystery recycle.
Mom and I decided to be adventurous and picked a variety of different colors. I started out with a silver base, added some dark metallic, painted on a few coats of bumpy light blue and a dark blue metallic around the rim. Mom went with the dark metallic, added some bumpy blue, put on a few coats of silver and called it a day! The “kid” opted to go full on silver glaze for her special pig!
Step three: Kiln drying
Before the pieces could be sent to the firing station they had to spent about 15 – 20 mins in the kiln to ensure the glaze was dry and ready for firing.
Step Four: Firing
We deposited our painted pieces in long line and began the wait for our firing. Raku differs from traditional firings in that the pottery is loaded into a hot kilm vs. cold. The firing proceeds at a rapid pace with the wares reaching temperature in as short a cycle as 15-20 minutes. The guys running the kiln had electronic meters attached and knew the pottery was close to done, when the meter surpassed 1850 degrees. When the firing is determined to be completed the wares are immediately removed from the kiln. Since at this point the glaze is molten, the volunteers used long metal tongs to lift the pieces from the kiln and move them to the second stage in the process.
The pots were put into a container in this case metal trash cans and metal buckets with lids along with combustible material such as sawdust and shredded newspaper and allowed to smoke for a period of time. The carbonaceous atmosphere reacts and affects the glazes and clay and imparts unique effects and surfaces to the wares. Some of these effects are metallic and crackled glazes surfaces and black unglazed clay. When the wares have cooled, they are washed with soap and water along with a green scrub pad to remove all residues of soot and ash.
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