[WWI] Laser substitute for photo-etch brass?

[Magnus Berggren]

Can you cut halfway, as with etching?

/Magnus

----- Original Message ----- 
From: "Allan Wright" <aew at unh.edu>
To: "World War I Modeling Mailing List" <wwi at wwi-models.org>
Sent: Wednesday, March 07, 2007 3:24 PM
Subject: Re: [WWI] Laser substitute for photo-etch brass?


> Mark,
>
>   Thanks for the excellent analysis. I also received similar supporting
> information from another source. Looks like I can safely laser evergreen
> sheet into useful modeling parts!
>
> Thanks again,
> Allan
>
>
> On Tue, 2007-03-06 at 19:43 -0600, Mark Shannon wrote:
>> Polystyrene, itself, does not have any chloride in it.  Hi-impact
>> polystyrene (the most common form used in plastic models) is a blend of
>> polystyrene and neoprene rubber, again with no chloride.  The additives
>> package (anti-oxidant, dyes, etc.) is not likely to have chloride in it,
>> since they work against the antioxidant effects.  There are some
>> 'engineering plastics" blends of polystyrene and other plastics that can
>> have chloride in them, and there is a chlorinated polystyrene -- where 
>> the
>> raw plastic is treated with chlorine, making a random mixture with and
>> overall controlled amount of chlorine.  These latter are not typically 
>> used
>> in models.
>>
>> I'm not sure you could make a blend of PVC and polystyrene -- I don't 
>> think
>> they are mutually 'soluble.'
>