drilling shell?
Doc Strangetrick
> >Can simply use a standard HSS Drill?
> >Thinking of making a custom watch dial is the reason I ask. Thank you.
>
> Diamond drills work best, and make sure you work with the shell under
> water. The shell dust is toxic in your lungs.
Does this go for all shells,Cameo,MOP etc
and just what excalty is toxic i realise the dust is but in what way is is
bad for you,what symptons etc
ive been working with it for years,drilling and using a file, etc and up to
now ive had no problems
Regards
Doc
Fishbre396
<midgaar...@earthlink.net> writes:
>Is a special type of drill required when drilling MOP or Paua shell?
>Can simply use a standard HSS Drill?
>Thinking of making a custom watch dial is the reason I ask. Thank you.
Hope you're wearing a mask, if not it can be deadly! You can drill with a
regular drill, make sure you are protected!!!
Lawrence Gould
drill it, saw it, file it etc but it does tend to wear tools out quite
quickly!
From
Lawrence Gould
www.gouldsjewellers.com
"Yeah Right" <midgaar...@earthlink.net> wrote in message
news:vff0bt4rbjq4t8odv...@4ax.com...
Marilee J. Layman
<midgaar...@earthlink.net> wrote:
>Is a special type of drill required when drilling MOP or Paua shell?
>Can simply use a standard HSS Drill?
>Thinking of making a custom watch dial is the reason I ask. Thank you.
Diamond drills work best, and make sure you work with the shell under
water. The shell dust is toxic in your lungs.
--
Marilee J. Layman
Bali Sterling Beads at Wholesale
http://www.basicbali.com
Yeah Right
adam
Doc Strangetrick <drstran...@libertysurf.co.uk> wrote:
> > >Is a special type of drill required when drilling MOP or Paua shell?
> > >Can simply use a standard HSS Drill?
Up to about 1.5mm a standard drill with water cooling is fine. Bigger holes
use a diamond burr with water. I use a small flattish 1litre container and
hold the thing underwater with only the bottom half of the burr in water.
> > ... The shell dust is toxic in your lungs.
> Does this go for all shells,Cameo,MOP etc
> and just what excalty is toxic i realise the dust is but in what way is is
> bad for you,what symptons etc
> ive been working with it for years,drilling and using a file, etc and up to
> now ive had no problems
It seems that it's a reaction against a foreign substance by your immune
system, (rather than a particularly nasty shape, as is the case with
asbestos). Shell is organic and similar but different enough to our own
immune system. Some people have a nasty 'whoop! whoop! pull up pull up'
reaction and they go into defensive mode (sorry can't be more specific) very
swiftly. So if you haven't had a reaction by now then maybe you won't. But if
I were you I wouldn't inhale the dust any more. Who knows what long term
effects are in store for you.
Brian
Auckland NEW ZEALAND
--
Spurious dot in email address
Marilee J. Layman
Yeah, but even if there isn't the immediate anaphylactic reaction,
there's still dust coating your lungs. You'll end up with emphysema.
Doc Strangetrick
i just get jobs now and again that require the shells to be ground down, or
the backs of mabe pearls to be flat, etc etc.
If i do use a lube to help the drill its normally oil,works for me and does
keep the dust together.
But as an Jeweller in Birminghams Jewellery quarter you have to understand
that i havent progressed out of the 18th century just yet
regards
Doc
Marilee J. Layman
Ah, Birmingham UK, I see. Well, can't hurt to put on a mask. :)
adam
Marilee J. Layman <mjla...@erols.com> wrote:
> On Sun, 18 Mar 2001 19:34:18 GMT, "Doc Strangetrick"
> <drstran...@libertysurf.co.uk> wrote:
> >But as an Jeweller in Birminghams Jewellery quarter you have to understand
> >that i havent progressed out of the 18th century just yet
> Ah, Birmingham UK, I see. Well, can't hurt to put on a mask. :)
They might do to hand masks out at the post-natal point, aye, to be sure.
By the way oil'd be quite a lot messier than water. And will penetrate the
shell and make it slightly smelly. Water too thin, add cornflour? ;)
Bri
Roxan-NO Spam
should be drilled under water to reduce the exposure to this. Wear a mask or
do outside.
Roxan
"adam" <ne...@ad.am.co.nz> wrote in message
news:c14bbtgpr7vbadqhh...@4ax.com...
C.M.Fox
fishb...@aol.comnojunk (Fishbre396) wrote:
Does this "deadly" warning include drilling pearls too? I'm always having
to enlarge holes in pearls.
Carla
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Remove doesn'tlivehere from my address to email me....
Stevens
Doc Strangetrick wrote:
> ...............................
> ive been working with it for year drilling and using a file, etc and up to
> now ive had no problems.............................
_______________________________________________
Shells are made, in part, of silica.
According to Merc manual, "Prolonged inhalation (5 to 25 yr)
of dust containing free crystalline silica is necessary
to establish silicosis."
One could be well on his/her way and not know it.
So, careful Doc!
Silica is also the reason that casters need to wear a mask, especially
during the quinching phase -- because it is mainly the smallest particles
that cause the disease. The little devels are fibrous, and the cilia
in your lungs can't clear them. Nodules eventually form around the fibers.
I'd like to give further details, but I need to light another cigarette
and get back to my asbestos soldering pad...........................;-/
Peter W. Rowe
<stevens40...@earthlink.net> wrote:
>>_______________________________________________
>>Shells are made, in part, of silica.
Perhaps a very small part, though I cannot find any documentation supporting
that possibility. Pearls and shells are normally described as being made of
Calcium Carbonate, with organic binders (materials holding the calcium carbonate
crystals together, which are much like the materials in fingernails, horn, etc.
Most of the time, irritation from shell or pearl dust is due to allergic
reaction to the organic materials, as well as possible microorganisms or various
toxins (from the environment in which the animal lived/died, perhaps
concentrated by the animal in the shell) which may be imbedded in the shell.
Prove this for yourself with a bit of shell and a bit of dilute HCL acid.
Silica does not dissolve in Hydrochloric. Shells and pearls most certainly, and
rapidly, do.
Peter
Doc Strangetrick
minimal as i work with shell or pearls on the odd occasion but i did a bit
of research and heres a link to silicosis sites,its mainly construction
workers but is interesting all the same
http://www.cdc.gov/niosh/consilic.html
hth a bit , im sure that all us in the jewellery industry are open to many
many hazards, though most of the old jewellers i know end up either drinking
themselves into a early grave, stressed from all the hard work or join the
BJA <G>
> I'd like to give further details, but I need to light another cigarette
> and get back to my asbestos soldering pad...........................;-/
yes i still got one of the those pads as well,as well as my old side light,
no extractor on the grinders,old lead pot with pickle in it heated off an
open flame,plus an
open plating tank with no fume cupboards
ok well i lied about the last one but i did once work for a firm with open
strippers that was aggitated by a air compessor that threw the cyanide
skywards..
Ahh the lovely old world of Birminghams jewellery quarter...UK.
Things havent much improved in the safety front here, the famous jewellers
school now UCE kept its cyanide and acids together on the same shelf till
there was a fire in the plating room and the whole of the Countys special
chemical teams were called out to sort it out..
truly amazing !!!!
Regards
Doc
slighty worried at the fact that i can see the jewellery quarter from where
i live...
LESLIE KINDER-ANDERSON
>to enlarge holes in pearls.
YES! Pearl and mother of pearl have virtually the came chemical
composition.
Leslie
jury...@gte.net
case I missed anyone.
I am trying to make a piece for my niece using some cabbed
alexandrite catseyes. Is it safe to put the stones in the mold and then
pour the silver (her choice of metal/open mold--form using delft clay),
or would this tend to shatter the stones? Thank you in advance
Gerard Goff
Fishbre396
foxondoesn'tliv...@imagina.com (C.M.Fox) writes:
>oes this "deadly" warning include drilling pearls too? I'm always having
>to enlarge holes in pearls.
If they are made of the same stuff (and some have said they are) I would
assume the same precautions should apply.
LESLIE KINDER-ANDERSON
are diamonds.
Your cat's eyes will definitely explode, or melt.
Leslie
C M
At best they will cloud and change to undesirable colors,
essentially making them worthless and ugly(I've lost a few stones
learning what not to do....)
\~^~/ "Things fall apart, the center will not hold.
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