From: "John Murray" 
To: 
Reply-To: "John Murray" 


G'day kartik,
        If you pour the pitch over an elevated surface on the pitch lap base,
won't
it just settle to the lowest level on the base defeating the intention anyway?

Cheers

John Murray
Whyalla
South Australia
Check our web page at http://astronomy.sa86net.com ATM and M-O-M stuff.


> Having not made a base for the polishing lap, I am toying with the
> idea of using a circular piece of plywood, cut to the size of the
> blank, as a base instead of cement or plaster. Since the central
> portion won't be elevated, the plywood being plane all over, I am
> thinking of placing a two millimetre thick circular piece in the
> centre, having a radius of two inches or so. The pitch will be poured
> over this and pressed with the blank in the usual way.
>
> I remember reading (perhaps on the list?) that this procedure can be
> used to make a base for the polising lap. Or should I go the usual way
> and cast a plaster or cement base?
>
> Sincerely,
> Kartik Patel,
> http://www.geocities.com/letapk/index.html
> kpatel{at}hotpop.com
>
>
>
>
>

--- BBBS/NT v4.01 Flag-4