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Well placed masking tape would be good to set the fine line reference
spacing. Spray paint the glass then remove the tape. Just like a
stencil. A stencil would be practical for mass production purposes.

On Jun 5, 8:16�am, Greg Rudzinski  wrote:
> Andres,
>
> � � �Welding glass will work to make the Trombone Kamal but you will
> need to precisely paint white reference lines onto glass to get a good
> visual.
>
> Greg
>
> On Jun 5, 12:38�am, "Andres Ruiz"  wrote:
>
> > Very interesting Greg,
>
> > It may be use a welding glass filter for the kamal, I use it for my bris 
sextant. For security, to protect our eyes.
>
> > A document about the accuracy of the kam�l can be found 
at:http://ckraju.net/IndianCalculus/Education/Kamal_pages.pdfhttp://ckra...
>
> > Andr�s Ruiz
> > Navigational Algorithmshttp://www.geocities.com/andresruizgonzalez
>
> > �filtsold.jpg
> > 11KViewDownload
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