Bill,
Thanks for the tips. Both are very interesting approaches. I will try both, the
abrasive blaster and the dremel-like one. But I think I need to buy a good
quality marble instead of the cheapest ones.
Thanks,
Ricardo
São Paulo - Brazil
-- Início da mensagem original ---
De: Bill Gottesman [EMAIL PROTECTED]
Para: Ricardo Cernic [EMAIL PROTECTED]
Cc: sundial sundial@uni-koeln.de
Data: Tue, 15 Jul 2008 10:25:06 -0400
Assunto: Re: How to engrave marble?
Very fine lines can be etched with an abrasive blaster. Silicon carbide
is the best blasting material, but aluminum oxide (less expensive) also
works well. I hire a sign maker to blast the granite (and occasionally
marble) stones for my Sawyer Equant sundials. The lines are about .040
wide and .005 deep, and paintfill nicely with the mask still in place.
The mask is a thin (sign) vinyl, cut on a signmaker's vinyl cutting
machine from an adobe illustrator file. It costs about $40 per stone.
If you do it yourself, be meticulous about eye and lung protection --
This can be hazardous. Photos on my website.
I'm sure you could also use a rotary dremel-like tool with an
inexpensive diamond ball bit. John Carmichael engraves his stone dials
this way. He gave a demonstration at his home a few years back, and
this method was very effective and did not appear too difficult. He
glues the design right against the stone, and cuts right through the
paper (or vellum?). He has a hose trickle water over the cutting
surface to cut down on dust and prolong tool life. His website is
www.sundialsculptures.com
Bill Gottesman
www.precisionsundials.com
Ricardo Cernic wrote:
Hi dialist fellows!
I'm considering to make a sundial with marble. Does anyone have some tips
in how to engrave this type os material? I've already manually engraved
slate with nails of different diameters, but when I try the same process
with marble I do not get neat lines.
What I'm looking for is a process that can be done at home without
machinery. Chemicals are an option.
Thanks,
Ricardo
São Paulo - Brazil
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