Paul B on tue 16 sep 03
i often spray over a hundred pieces or more at a time and do have that
problem sometimes as well, but it never shows up on the finished pots.
sometimes i just have to smooth it over with my hands and spray over it.
But mostly i have learned to avoid the problem through trial and error and
have an intuitive sense of how fast and how thick to spray. One thing i
have found for sure that helps when spraying is to keep the glaze as thick
as possible, as long as it doesn't clog the gun. Milk-thickness is probably
fine but you may be able to go thicker - mine would be more like thick
cream, to use the same analogy. Makes it a lot easier to get a good coat on
faster and with less drying problems like blisters and flaking. Also adding
small amounts of bentonite and cmc or veegum alows me to apply as thick as
i want, like for copper reds, with almost no crawling or other related
problems. For ash glazes i had to add considerably more of it.
Paul B
Falmouth,ky
Phil Smith on tue 16 sep 03
Hi,
When Spraying large pieces some glazes tend to blister(form bubbles) when
I make a pass over previously sprayed surface.
I bisque to 06.
Glaze consistency is appx. chocolate milk.
Are there any tips to avoid this problem?
Would Macaloid help?
Thanks.
Phil...
John Britt on tue 16 sep 03
Phil,
I believe that this is caused by allowing the first coat to get too dry.
Then the second coat is rehydrating the first and causing it to bubble up
underneath.
Try to spray thinner coats faster so that you do not allow the first coat
to get so dry.
Hope that helps,
John
Susan Setley on tue 16 sep 03
In a message dated 9/16/03 6:28:56 PM, clay@PENLAND.ORG writes:
<< Phil,
I believe that this is caused by allowing the first coat to get too dry.
Then the second coat is rehydrating the first and causing it to bubble up
underneath.
Try to spray thinner coats faster so that you do not allow the first coat
to get so dry.
Hope that helps,
John
>>
Really...
That just happened to me on a plate -- I dipped it horizontally through a
large bowl, and it formed bubbles.
Would it help to thin the glaze a little, or to dampen the surface slightly?
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