Richard Aerni on fri 7 dec 01
> Not trying to bang my own drum, at least not too hard...
>
> The last couple of workshops I've given, I've brought my glazes and spray
> gun, and encouraged the participants to bring a piece or two of greenware
or
> bisqueware. We then spent a part of day two going through spray glazing
> techniques, looking at pots and explaining how different results were
> obtained, having a demo, and then letting the students go at it with their
> own work. Meanwhile, I went back to the wheel and kept going with my work
> whilst the students were off one or two at a time glazing. Seemed to work
> out fine, and the reports that have gotten back to me about the finished
> work were good. Of course, the studio has to have a spray setup. One of
> the places I was at had a commercial booth that was far inferior to the
> handmade one I've cobbled together in my studio, and if I was working
there,
> I'd not spray. When you're spraying glazes, you shouldn't feel as though
> you're walking through a fine mist. The spray should go out the exit
flue.
> At any rate, it's not that difficult to work spraying into a workshop.
Just
> depends upon what the potter has decided to do, or what the sponsoring
> organization wants the potter to do.
> Best,
> Richard Aerni
> Bloomfield, NY
> ----- Original Message -----
> From: "Cindi Anderson"
>
>
> > Spraying glaze would be very interesting in a workshop. I have been to
> many
> > workshops at the Mendocino Art Center that are excellent. But haven't
> seen
> > spraying. Also, have never been at a workshop that did anything with
> > trimming, which I am lousy at.
> > Thanks
> > Cindi
Marcia Selsor on fri 7 dec 01
I, too, have demonstrated spraying techniques at workshops. I use a latex resist
for raku images
and demonstrate how to use that with spraying.
Marcia Selsor
Richard Aerni wrote:
> > Not trying to bang my own drum, at least not too hard...
> >
> > The last couple of workshops I've given, I've brought my glazes and spray
> > gun, and encouraged the participants to bring a piece or two of greenware
> or
> > bisqueware. We then spent a part of day two going through spray glazing
> > techniques, looking at pots and explaining how different results were
> > obtained, having a demo, and then letting the students go at it with their
> > own work.
> SNIP
> ----- Original Message -----
> > From: "Cindi Anderson"
> >
> >
> > > Spraying glaze would be very interesting in a workshop. I have been to
> > many
> > > workshops at the Mendocino Art Center that are excellent. But haven't
> > seen
> > > spraying. Also, have never been at a workshop that did anything with
> > > trimming, which I am lousy at.
> > > Thanks
> > > Cindi
>
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Lorraine Pierce on fri 7 dec 01
Hi Richard; would it be possible to post directions to make the 'spray booth
you have cobbled together'? I would particularly like to know how you have
positioned the fan, and if it is a squirrel blower-to-vent, or other type of
fan. Thank you, Lori Pierce in New Port Richey Fl.
Richard Aerni on fri 7 dec 01
Lori,
I did post a description of the spray booth on clayart several years ago;
perhaps it's on the archives. However, in the interest of science, I'll
give it another shot here.
I make larger type pots sometimes, so I wanted to have a spray chamber that
would handle them easily. So, I built a chamber that measures four feet
deep, four feet wide, and four feet high. I built it around an old Brent
wheel, mounted on concrete blocks for the proper height. Essentially, I
just took two by fours, roughed in a frame eight feet high, and boxed in the
top. I drywalled the walls and top, and lined the box with construction
plastic. I ran a couple of 2 x 4 runners from front to back, so that when I
put some formica boards on them, they just came underneath wheel height. I
ran a couple of horizontal pieces of drywall across the front so that the
opening wasn't a full 4' x 4', in order to restrict backspray. I happened
to have an old squirrel cage blower from my old house's furnace around, and
sealed off one side and then mounted it on a rough table, so that the open
end was facing in to the spray chamber. The fan was positioned at the back
right side of the box, at wheel height. I'm left handed, so I figured the
spray would go across the pot and then directly into the fan. I cut out the
proper sized hole in the drywall, used construction styrofoam to roughly
seal the opening on the outside, and then duct taped the whole deal. It was
pretty airtight. I had mounted a filter on the inside of the box, but after
a few sessions decided the booth worked better without it. I exhaust the
booth outside. I've got about 100 meters before it gets to anyone else's
property, so I don't worry about the effects of the exhaust. The grass
under the outlet vent is still growing fine after 15 years. The fan has
enough capacity in terms of air movement per second that air in the box is
exchanged roughly once every 1.5 seconds. I don't get much in the way of
backspray. Every three or four kilnloads I take a flat piece of metal and
spend 10 minutes scraping dried glaze off of the blades of the exhaust fan.
Then I spray them with water and they're clean as a whistle. My first motor
for the fan worked for 14 years, and glazed roughly 500 loads of pots
(35,000 cubic feet of pottery) before it burnt out this summer. I happened
to have obtained another furnace blower in the meanwhile, and took an hour
or so to install it and seal it. It's worked fine ever since. I did also
hang a flourescent light fixture from the top, so that the inside is plenty
light. It cost me probably 50 dollars (excluding the cost of the wheel, and
the cost of the compressor and spray gun) to build the booth. Controlling
the speed of the wheel with my foot leaves my hands free, which is a big
advantage. I'm not a mechanic, grease monkey type of guy. More of a
weekend tinkerer. Vince or David Hendley or Jonathan K. would no doubt make
a much better product. However, I've been satisfied with the results so
far.
Good luck, and if things are still unclear, just drop me a line.
Richard Aerni
Bloomfield, NY
----- Original Message -----
From: "Lorraine Pierce"
To:
Sent: Friday, December 07, 2001 12:01 PM
Subject: Re: Workshop Envy - spraying glazes
> Hi Richard; would it be possible to post directions to make the 'spray
booth
> you have cobbled together'? I would particularly like to know how you
have
> positioned the fan, and if it is a squirrel blower-to-vent, or other type
of
> fan. Thank you, Lori Pierce in New Port Richey Fl.
>
>
____________________________________________________________________________
__
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
melpots@pclink.com.
>
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