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Posted 18 Jun 2013I know there was a presentation @ NCECA in '05 or '06 that touched on it, and I feel as though I read something in CM or Studio Potter at one point, but Im coming up blank when it comes to specifics....
The NCECA presentation you mention might have been one that I did.
What exactly do you want to know?
Holy thread resurrection--sorry.
I was looking for particulate information, as well as carbon emissions in comparison to a similarly sized gas kiln
Posted 16 Jun 2013How many and what size holes to you drill in the bottom of your kiln when you attach the entire event?
I went through my junk pile and I think I can make myself one for about five dollars of stuff from the hardware store.
I was contemplating on making a vent myself. The number, location and size of the kiln holes can be found in the instructions booklets of the commercial vents.
The most interesting part is the size and number of the holes in the vent cup itself and their relationship to the CFM produced by your fan. The holes are made to drastically decrease temperature of the exhaust air and limit the air flow through the kiln chamber to minimally acceptable. One way is to copy the design (EnviroVent2 used 140 CFM fan and 3" duct, but I don't know the number and exact size of the cup holes). Another way is to make the holes size adjustable and use a fan you have on hand.
There is a vent hole chart that corresponds to a variety of differently sized kilns contained in the envirovent manual here
Posted 16 Jun 2013Manganese Dioxide is toxic ,penetrates the skin, fumes are bad as is ingestion.
I wouldn't use it in a clay body. If I use it in a glaze I don't have my hands in it. Dave Shaner thinks it is what effected his health. Hans Coper also. Cheap is not necessarily wise.
I think you are incorrect with regards to manganese penetrating skin, it has been explained to me that because of the particle size of MnO2 and the fact that it is not soluble it cannot be absorbed through skin. I do know that it can cause mild skin irritation in some people, perhaps this is what you were thinking?
Posted 13 Jun 2013
Just because she does not reply, does not mean she didn't read the posts. It is a little irritating not to see a reply post, but then it happens.
between myself, jim, and pres it looks like we covered the gamut for responses pretty well
Posted 13 Jun 2013
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- Making objects