There are 4 messages in this issue.

Topics in today's digest:

      1. Sandblasting Metal Objects
           From: "Roderick J. Geis" <geis@xxxxxxx.xxxx
      2. Engraving sheet glass.
           From: "Paul Stevenson" <p.stevenson@xxxxxx.xxxx
      3. SBX liquid emulsion.
           From: "Paul Stevenson" <p.stevenson@xxxxxx.xxxx
      4. Yet more resists!
           From: "Paul Stevenson" <p.stevenson@xxxxxx.xxxx


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Message: 1
   Date: Fri, 18 Jun 1999 10:06:07 -0800
   From: "Roderick J. Geis" <geis@xxxxxxx.xxxx
Subject: Sandblasting Metal Objects

Speaking from painful experience... In addition to grounding yourself make sure 
that the cabinet that you are blasting in is well grounded and that the metal 
object you are blasting stays in contact with the cabinet.  Additional grounding 
may be needed on the object itself.  This becomes even more dangerous when 
humidity is low (winter time.) I made the mistake of  blasting a metal plate 
while holding it in my hand last 
January. Ouch!

Roderick

> I have one suggestion. Make sure that you wear a grounding strap. I've done a
> couple of metal pieces and the sparks and lighting strikes made for an
> interesting time. 



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Message: 2
   Date: Fri, 18 Jun 1999 22:59:47 +0100
   From: "Paul Stevenson" <p.stevenson@xxxxxx.xxxx
Subject: Engraving sheet glass.

Dear Friends,

I've read at various places about the dangers of sandblasting panel / sheet
glass.

Apparently it may have a tendency to explode during or at any time after
sandblasting has been completed.

Is this a common occurance?

I would assume this condition might be more common with security / toughened
glass?

I've done large mirrors before, but in the event that I had a door/window
panel to engrave, I'd appreciate any comments on the safety aspect, thanks.

Bye for now,

Paul Stevenson



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Message: 3
   Date: Fri, 18 Jun 1999 22:59:53 +0100
   From: "Paul Stevenson" <p.stevenson@xxxxxx.xxxx
Subject: SBX liquid emulsion.

Hi, me again.

I'd appreciate any tips on using SBX liquid emulsion as a resist.

Particularly, in applying it to the substrate, how would you ensure that it
levels out to a consistent thickness?

Can you recommend any exposure time:coating thickness ratio?

Any help appreciated, thanks.

Paul Stevenson



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Message: 4
   Date: Fri, 18 Jun 1999 22:59:59 +0100
   From: "Paul Stevenson" <p.stevenson@xxxxxx.xxxx
Subject: Yet more resists!

Promise this is the last one tonight...!

Autotype supply a film similar to capillex that can be used as a resist, so
they tell me.

I would presume it's something similar to the Photobrasive product.

I've used capillex as a resist for screenprinting signs before, but I'd be
interested to hear your experiences of using the Autotype and Photobrasive
products.

Paul Stevenson.