I think there is a typo on the topic... are you sure it is not "PAIN" brush?
jk
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Douglas O. Pauls
Sent: Wednesday, March 15, 2006 10:54 AM
To: [log in to unmask]
Subject: Re: [TN] ESD and paintbrushes
Finally I can get a word into this debate first started by Doug Pauls:
**And I get to argue with you, fun fun fun.
I recommend the use of bare wood (unvarnished) pure sable artist brushes
from a reputable manufacturer. Why?
**And if I had control over the accounting and purchasing weenies who "find
a cheaper brush that works just as well", I might be able to get pure sable
artist brushes from a reputable manufacturer.
1 They resolve ESD issues
**Even the imaginary ones? The point of my original question, though not
stated, is that you can take the viewpoint of "its and insulating material
so it can't go into my work area" to ridiculous extremes. I could point out
that many of our wooden brush handles are coated with a nice red or brown
paint, which is, tada, an insulator.
2 Plain wood so that there is no risk of paint or varnish "contaminating"
your work
**That is one we have never had a problem with here.
3 Pure sable because, looked after properly, they will all but last
forever - ask Michelangelo...
**That depends (I now feel obligated to use the phrase). Michelangelo was
not using Humiseal 1B31. The toluene solvent in the coating we use is very
hard on natural bristles and wears them out. Synthetic fibers last much
longer and the construction of the brushes is usually better, which is why
I was looking for some more concrete data. Everyone seems to take the
viewpoint of "nylon is an insulator so it can't be good". Anyone have data
on that, or is it an assumption? I am working on generating data, which I
will share.
4 The "crimp" needs to be as secure as possible to minimise hair loss
(ooh
I can just see the fun you can have with that remark).
**True, but overcrimping, as some of our operators do to "make sure the
crimp is good enough" also tends to cut the bristles and leads to addtional
bristle loss. Like Amol, we have rejects due to bristles that have dropped
from brushes and is a constant thorn in the side of our coating operations.
Some of our operators use an EFD station to do some coating work, using a
pneumatic syringe, tipped with soft nylon bristles. The nylon lasts much
longer and when a fiber pulls out, the white color and long bristle length
make them noticable immediately. Being able to use a nylon or other
synthetic brush material, like Taklon, would make our operators life easier
and cut down on defects. That's why I asked the question. All of the
answers I have gotten so far are that such materials are not allowed
because they are insulative materials. I think a guy could make a killing
in the industry coming up with an ESD safe nylon/synthetic brush with
fluorescent orange/green bristles.
If you are doing stripping and localised "cleaning" (OK, dirt
redistribution) then pure Hog Bristle works best.
**As an Iowa resident, I am all for increased use of Hog products.
Such brushes are available from Concoat/HumiSeal and no doubt others....
**No doubt.
Doug Pauls
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