?

Log in

No account? Create an account
Hobby of the month
My crap
dac reduction kiln firing 
19th-May-2006 08:53 pm
spent today firing the student kiln in marvellous reduction goodness. dig the groovy flames:



onto further cool flame based fotografy:

  
 above we see the kiln @ 900° C firing with a reduction flame. this means i've staved the kiln of good ol' oxygen which then ignites when it finally escapes the kiln.  this type of firing turns coppers nice and red and draws cool effects from the the clay body and glazes.
the flame top right is coming out a good hand span (and no i'm not sticking my hand beside it...)
 the kiln below is now @ 1100° C and the flame is tinged with copper and you can see the actual kiln is a lot hotter. although not nearly as spectacular, this is funky to watch as the gas being blow in makes a good noise, and the roar of fire is promising fun times if it escapes...
  


i have six bowls in this firing all with a copper glaze. they're placed on different shelves and in different spots so i can gain a better understanding of what will happen in different areas of this kiln in later firings.

all up it took 6 hrs to fire to cone 9 (and a half ;)
Comments 
19th-May-2006 11:51 am (UTC)
Can't wait to see pictures of the final results!!!
19th-May-2006 12:16 pm (UTC)
that's monday now.

actually i predict i won't even get close to the required results *grin* but in terms of understanding the kiln i'm feeling the winner.

i really shoudl take a foto of a test piece that i a trying to replicate, then you may understnad a bit better where i am going.

my journal sure has become very tafe-centric these past few months. can you tell it's turned cold and there's no bee activity going on ?

19th-May-2006 01:02 pm (UTC)
You could put the bees in the kiln. That'd keep them warm and active.

...Or not.
19th-May-2006 03:05 pm (UTC)
YOU put them in there... i'll watch and laugh
20th-May-2006 08:26 am (UTC)
Hehe...
Very good reduction but...that is a dam'd good flame coming out the peep hole...
But I love the reflection in the 1st pic...alomost like an artwork in iself...
20th-May-2006 01:28 pm (UTC)
we won't disscuss how i closed the primary air intake as well as closed the air dampers *grin*

instead we'll pretend that i meant it all as a really heavy reduction. yes.

as for the reflection, that's the cyclone wire gate that covers over the kiln (includes chain and padlock for entirely decrative purposes)

*sigh*
22nd-May-2006 12:38 am (UTC)
well that is how i usually do reduction...a little air is good...
Did you lose temp in the kiln?
22nd-May-2006 12:37 pm (UTC)
didn't lose temp but it sure didn't climb anymore ;)

i opened the damper a bit and it started to rise again. hurrah.
20th-May-2006 08:45 pm (UTC)
Some sexy reduction there.

We've got two tiny (about 6 cubic inches!)gas kilns at school that are used for enamelling and I keep wanting to try out a reducion on them. They get up to 1000° C in silly time, about 10 minutes!
20th-May-2006 11:16 pm (UTC)
woah. fast! you may not wish to fire pottery at those speeds, the rule of thumb is 100° an hour for bisque firings, and 150° an hour for glaze/stoneware firings - you can of course try faster but you'd need to experiment with your clay body to see how far you can push it.

however, i'd love to know what does happen if you fired things super fast *grin* let me know!
21st-May-2006 11:11 am (UTC)
Yeah, I know, but that is on full whack, I could turn it right down and do it slower. It might work though, if I treat it a bit like a raku firing. I'll probably do that over the summer hols when my boss is away.
This page was loaded Oct 23rd 2017, 6:15 am GMT.