[Clayart] Porcelain question

Ken Chase kchase235 at gmail.com
Sat Jul 2 18:53:11 EDT 2016

Well Jeff, you really got me thinking.
Is there a safe way to carve and sand bone dry
Porcelain? Outdoors maybe?
The mask I wear is Hepa approved but if what
You say is correct long after the mask comes
Off I still risk breathing in silica.
If you know of some safeguards I'd appreciate
Hearing about them.
Thanks much.

Sent from my iPad

> On Jul 2, 2016, at 11:38 AM, Jeff Lawrence via Clayart <clayart at lists.clayartworld.com> wrote:
> Ken Chase wrote:
>> Thanks Jeff:
>> I work alone. I carve bone dry porcelain in my
>> Garage. I do wear a mask. I don't believe I'm putting anyone at risk.
>> Your tenor of your post suggests you made an uninformed Assumption.
>> I do appreciate the good advice.
> Hi Ken,
> I have a skeptical bone, too, and sadly find I make many uninformed
> assumptions. It's certainly possible I did so here. I encourage further
> research from more trusted sources.
> The tone I strove for was humor-lightened dead serious, but your reply
> suggests I failed. It might be I spent too many years fruitlessly telling
> employees  the dust they raised was bad for both them and me.
> As I said, the choice of clay condemns us to some clay in our lungs - no
> way to avoid it entirely. And the histrionic tendency to exaggerate dangers
> these days is not a bus I care to board.  But clay particles are very small
> - any particles bigger than 2 um (2/1,000,000) get promoted to silt, and
> don't exhibit the plasticity that makes clay so enjoyable. Particles
> smaller than 2.5 um are too small for our lungs to cough out, so they stay
> there. I leave the arithmetic as an exercise for the student. Now, knowing
> that each of those particles can slake its electrostatic yearning for water
> either with water we add or the water it finds in our our chest cavity, I
> personally opt for the first. Please confirm this from reliable sources.
> I maintain that protective gear not HEPA-rated does no good, but please
> seek out a second opinion (but not from the bozo who taught you to carve
> dry.) Carving in your garage means those particles will float around,
> settling only over hours or days, then recirculating every time there's air
> movement to roil the up.
> As for microcracks in dried clay, there's a good section on it in Fraser's
> book, "Ceramic Faults and Their Remedies." And it's a good read if you ever
> want to get beyond a superficial knowledge of clay.
> Best,
> Jeff
> Jeff Lawrence
> jefflawr at gmail.com
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