[SEL] Need Sandblast Helmet Visor Substitute

[Paul Maples]

I want to thank everyone who wrote in with suggestions for a temporary 
substitute for a sacrificial visor for my sandblast helmet, I got a lot of 
super ideas and I appreciate each and every one of them, many thanks Guys.

Paul


----- Original Message ----- 
From: "Jerry Evans" <jerrye at databak.co.za>
To: <sel at lists.stationary-engine.com>
Sent: Wednesday, February 28, 2007 12:25 PM
Subject: [SEL] Need Sandblast Helmet Visor Substitute


>>>Paul
>
> Hi Paul,
>         This question cropped up previously. My previous business was a 
> plastic supply house and we supplied a lot of material for sandblasting 
> cabinets as well as goggles.
>
>         Quite a few people have mentioned "Plexiglas". Plexiglas is a 
> trade name for acrylic sheet (polymethylmethacrylate or PMMA)  (I cannot 
> remember who's but it may be Rohm & Haas) and is the same material as 
> "Perspex" (which is I.C.I's trade name).  Although this does work, it is 
> not the ideal material as it is very hard and scratches very easily.
>
>         We always supplied Polycarbonate (PC) (Peter Forbes mentioned 
> Makrolon which is a trade name for polycarbonate as is Lexan). PC is much 
> stronger than acrylic but also a bit softer and is better at resisting 
> scratches from stuff like sandblast grit. It will also get to the stage 
> that it