Subject: sandblasting

From: [email-masked] (ROMEUG)
Date: 29 Apr 1996 23:42:23 -0400

i am looking for a good tape resist to get a clean border around a 33x60
glass tabletop that is required for a commision i am working on.  most of
the tape i use is quickly disinigrated by the force of my pressure feed
blaster using quickblast fine sand.  i use this sand primarily because i
do not have a booth, doing it outside, and can only reclaim a limited
amount, therefore cost effective.  i have been saving a good portion of
the media and screening it, hopefully to expand on available textures as
the sand wears.  the resist i have been using is a transparent polyester
film which works well for the designs that i etch, but i would like to
expand my repetoire.  ive heard that silicone caulk works well. any other
methods or resources would be greatly appreciated.

also, is there any mailorder sandblast suppliers or in the philadelphia
area?

thank you
gabriel
[email-masked]

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From: [email-masked] (Blake Malkamaki)
Date: Mon, 29 Apr 1996 23:59:30 -0500

In article <[email-masked]>, [email-masked] (ROMEUG) wrote:

$ i am looking for a good tape resist to get a clean border around a 33x60
$ glass tabletop that is required for a commision i am working on.  most of
$ the tape i use is quickly disinigrated by the force of my pressure feed
$ blaster using quickblast fine sand.  i use this sand primarily because i
$ do not have a booth, doing it outside, and can only reclaim a limited
$ amount, therefore cost effective.  i have been saving a good portion of
$ the media and screening it, hopefully to expand on available textures as
$ the sand wears.  the resist i have been using is a transparent polyester
$ film which works well for the designs that i etch, but i would like to
$ expand my repetoire.  ive heard that silicone caulk works well. any other
$ methods or resources would be greatly appreciated.
$ 
$ also, is there any mailorder sandblast suppliers or in the philadelphia
$ area?
$ 
$ thank you
$ gabriel
$ [email-masked]

There is a rubber masking material that we use when sandblasting wood
signs.  This is about 1/16" thick and can even be computer cut.
Blake Malkamaki, Little Mountain Ironworks, Concord, Ohio <[email-masked]>
>>Steam engines - Cletrac Crawler Tractors - Maple Syrup - Metal Signs<<
http://www.ncweb.com/users/blake

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From: [email-masked] (darylb)
Date: Tue, 30 Apr 1996 13:32:25 +0000

Sounds like you want electrical tape 3ft wide. I experimented with
electrical tape and it seamed to work but I ultimately wanted to try fancy
patterns and electrical tape precluded this

Daryl

-- 
A Prisoner of "BOTTOMLINE WORLD"

To those who followed Columbus and Cortez, the New World truly seemed incredible because of the natural endowments. The land often announced itself with a heavy scent miles out into the ocean. Giovanni da Verrazano in 1524 smelled the cedars of the East Coast a hundred leagues out. The men of Henry Hudson's Half Moon were temporarily disarmed by the fragrance of the New Jersey shore, while ships running farther up the coast occasionally swam through large beds of  flowers. Wherever they came inland they found a rich riot of color and sound, of game and luxuriant vegetation. Had they been other than who they were, they might have written a new mythology here. As it was, they took inventory.- Frederick Turner

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From: [email-masked] (Chris Kantarjiev)
Date: 30 Apr 1996 18:08:26 GMT

I have never done it sandblasting, but I often use plasticene
(modeling clay) as a masking agent when painting. It just might work
for blasting glass; worth giving a try.

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From: [email-masked] (ROMEUG)
Date: 3 May 1996 05:17:45 -0400

>patterns and electrical tape precluded this

appreciate your response, electrical tape wwill probably work fine.  have
just tried multiple layers of contact paper, scored and trimmed it and it
worked well.  to do patterning, have had good success with cutting acetate
and spray contact adhesive.

gabriel

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From: [email-masked] (ROMEUG)
Date: 3 May 1996 05:17:48 -0400

>for blasting glass; worth giving a try.

nice idea, probably be able to vary depth by building thickness, adhesion
might be a bit of a difficulty.  in the same vein, have had success using
silicone caulk for a painterly line.

gabriel

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From: [email-masked] (darylb)
Date: Sat, 04 May 1996 18:25:05 +0000

> and spray contact adhesive.

Just curious, how many CFM are you pushing? I was doing 185 CFM (which is
a lot) and the tape held fine. What spay adhesive were you using? My
experience with spray adhesives (which is NOT a lot) would have me picture
acetate flying over the horizon at 185CFM. What is contact paper? 
Please email directly at "[email-masked]" as I just had a kid and will be
off for a while.