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Posted by DKat on March 4, 2007, 8:35 am
Please log in for more thread options Sorry - forgot the header
> If you are only venting your kiln with the peep holes then you vent the
> kiln when gases are being released. The Peep hole should be closed up
> after that. I vent my kiln the entire time to keep the temperature even
> and because that is what the manufacture recommends but that is with a
> down draft vent. Having the peep holes open is not good in general
> because you are getting cold spots in your kiln with them that way.
>
> I'm very confused by your table - here is what one of my cone6 firing and
> the timing typically is
>
> Glaze Cone6
Temp change/hr temp hold time
72
100 220 1.48
350 2000 5.09
150 2180 0.42hr hold 1.20
500 1900 0.56
125 1400 4.00
> Total time 12.74
>
>
> Note that it takes 5 hours to get from 220F to 2000F. I'm holding it for
> a long time (around 25minutes) in this firing but it is under cone6. I
> ramp down slowly after 1900F. My total time firing is almost 13 hours.
>
>> This is my 5th firing or so with glaze. I'm using Cone 6.
>>
>> Yesterday I started my typical glaze firing however I'm having
>> problems getting the kiln up to temp.
>>
>> Here's my process:
>>
>> Cone 6 into my sitter
>> Bottom 2 peep holes plugged
>> Top peep hole open
>>
>> 250F - 1 Hour
>> 1676F - 2 Hours
>> 1926F - 2 Hours
>> 2200 - 3 Hours
>>
>> Usually during that 3 hour time period my kiln sitter will shutoff and
>> it's all done. This time however, it's been going for about 11 hours
>> and it's till not turning off.
>>
>> Should I close up the top peep hole? Should I open up all? Is it
>> getting enough oxygen? VERY NEW to this.
>>
>> Thanks
>>
>> -Steve
>>
>
>
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