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Health hazards from WSF dust ? [message #86130] Wed, 12 March 2014 13:43 UTC Go to next message
avatar tebee  is currently offline tebee
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Registered: December 2010
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I just got a batch of models from Shapeways in WSF that were badly cleaned and covered in a layer of un-fused WSF powder.

Upon trying to clean these myself with a toothbrush, after a few I find myself wheezing and coughing. Are there any health hazards from this dust or is it just that I'm very sensitive to dust at the moment, as I'm just starting on my yearly dose of Hay Fever?

Tom
Re: Health hazards from WSF dust ? [message #86134 is a reply to message #86130 ] Wed, 12 March 2014 14:42 UTC Go to previous messageGo to next message
avatar Youknowwho4eva  is currently offline Youknowwho4eva
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I'd think it's at least as bad as breathing in any other particulate.


I learned a long time ago the wisest thing I can do is be on my own side, be an advocate for myself and others like me. -Maya Angelou
michael@shapeways.com Community Advocate
Re: Health hazards from WSF dust ? [message #86135 is a reply to message #86130 ] Wed, 12 March 2014 14:52 UTC Go to previous messageGo to next message
avatar feklee  is currently offline feklee
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Could one rinse models with water for cleaning?
Re: Health hazards from WSF dust ? [message #86136 is a reply to message #86135 ] Wed, 12 March 2014 15:02 UTC Go to previous messageGo to next message
avatar HOLDEN8702  is currently offline HOLDEN8702
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Sure.

I have immersed WSF models in a water can for days.

I've made also experiments with tea and coffee to test shadow finish. Coffee is hardest, but it leaves some spots. Tea gives more lighter shade.
Re: Health hazards from WSF dust ? [message #86145 is a reply to message #86130 ] Wed, 12 March 2014 16:49 UTC Go to previous messageGo to next message
avatar Youknowwho4eva  is currently offline Youknowwho4eva
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So everyone knows, we (shapeways) shouldn't be sending improperly cleaned models. I've reported this incident but please email service whenever you have such incidents.


I learned a long time ago the wisest thing I can do is be on my own side, be an advocate for myself and others like me. -Maya Angelou
michael@shapeways.com Community Advocate
Re: Health hazards from WSF dust ? [message #86149 is a reply to message #86130 ] Wed, 12 March 2014 17:40 UTC Go to previous messageGo to next message
avatar stop4stuff  is currently offline stop4stuff
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MSDS says, do not breath in dust.
http://www.shapeways.com/rrstatic/material_docs/msds-strongf lex.pdf

Paul
Re: Health hazards from WSF dust ? [message #86150 is a reply to message #86130 ] Wed, 12 March 2014 17:45 UTC Go to previous messageGo to next message
avatar FreeRangeBrain  is currently offline FreeRangeBrain
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First: the disclaimer. I'm not a medical authority.

The material is nylon, which is "reasonably" inert and should not interact harmfully with your lungs. The particles are not likely small enough to interfere with cellular activity. Much like most other environmental dust, the particles will be moved out of your lungs by action of the cilia on the lining of the lung tissue. I doubt there would be a statistically significant health risk, due to the lack of prolonged and/or persistent exposure. If you have concerns, wear a common filter mask similar to one's used by medical staff. (ie.: Respirator not required.)


Creativity - sometimes by the brute force method.
Re: Health hazards from WSF dust ? [message #86163 is a reply to message #86130 ] Wed, 12 March 2014 23:19 UTC Go to previous messageGo to next message
avatar tebee  is currently offline tebee
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Registered: December 2010
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I've resorted to putting them in an ultrasonic cleaning bath . After several 45 min sessions I've been able to clear most of the loose powder, though some remains stubbornly sticking. The ultrasonic cleaning solution does not seem to precipitate the powder like it does with most things

Using the old toothbrush on the now wet powder seems to remove it without the dust though.

This is one of the items as it came, with all the detail caked in powder.

index.php?t=getfile&id=54259&private=0


  • Attachment: IMG_9241.JPG
    (Size: 1.95MB, Downloaded 81 time(s))

Re: Health hazards from WSF dust ? [message #86214 is a reply to message #86163 ] Fri, 14 March 2014 11:31 UTC Go to previous message
avatar stop4stuff  is currently offline stop4stuff
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Someone correct me if I'm wrong.
Here's what I think;

WSF is printed under a vacuum so there's no air trapped in with the powder.
An ultrasonic cleaner works by creating tiny air bubbles (cavitation) on the surface of whatever is being cleaned.
As the surface of WSF covered in powder is essentially a 'solid' surface, ultrasonic cleaning has little effect.

A couple of ideas I can suggest;

1. Adapt a plastic bottle so that it can be attached to a vacuum cleaner,
- make a platform with small holes it in to sit snuggly inside the bottle
- use a brush to brush off the powder into the bottle whilst the vacuum cleaner is running.

2. Grab the windscreen washer system from an old car
- hook the pump upto a 12v supply
- use this as a mini high(ish) pressure washer to hose off the powder.

Paul



 
   
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