Hi Kathy, I just took a torch firing workshop at Thompson Enamels
last weekend. The Mapp gas was used with a glass, lamp-workers bead
torch, with “rosebud” config. ie, a lot of holes in a flower petal
arrangement, or circle. Large hot flame, blue in color is produced,
and clean burning compared to my air-acetylene ‘presto-lite’ torch
(plumbers torch.) It would fire the very thin tooled 3-d shapes in
copper he demoed in 1-2 min. I think it’s a Hot-Spot, if I recall,
and was $30 there. Can do a couple torches to work a larger, over 3"
piece. Put on a stainless steel mesh for enameling on a tall holder,
lab-bracket. Fire from below.
CAREFUL: don’t upend the torch/ tank or it spits out a very scary
long tongue of yellow flame from the liquid getting to the torch
stem. Eyebrows and more !
The torch was very like the berzomatic propane types in hardware
stores that screw onto a propane tank. Mapp comes in a similiar but
yellow tank at our local Tractor and Feed store. The large bushy
blue flame was ideal for this, I plan to show our local metal arts
guild what I learned. I have a couple kilns, and a BFA in enameling
in a past life,and now pulled them out to get ready to have a happy
old age! But the raku and torching workshop was great in pulling back
from the anal, fussy, very precise work in some styles of enamels I
Also, he demoed a method with a garage -sale turkey fryer burner and
a large ‘weed-burner’ torch, both on large BBQ tanks of propane. The
large panels could be laid on the metal grate, held hot from below,
and the larger, 3-4" diam torch with long stem of 3ft, and hose to
the tank, heats from top, melting the enamel.
We didn’t have a large panel to work, but did fire small one to show
the setup. Opens up real possibilities for me! Contact me off list if
it’s not clear.