Re: Absorb UV Light?

From: Joseph DeGuglielmo (
Date: Wed Feb 11 1998 - 04:04:27 EET

We had a similar problem with a SLA 350. We solved it by putting a light
trap at the laser park position. It simply is a piece of aluminum with a 1/4
inch hole drilled in it about a half inch deep. The light bounces around
inside the hole .

Miller, Michael W wrote:

> We are getting surface skinning (cured resin) in the right front corner
> of our SLA500 near where the laser parks between layers. Our 3d
> maintenance person believes it is caused by laser reflection off all the
> resin spills on the cover plate. It has been suggested we dip the cover
> into hot water to soften and then remove the spilled resin. An
> alternate solution might be to paint? or apply some material in the area
> that would absorb rather than reflect the UV. Any suggestions as to
> what cheap and readily available material effectively absorbs UV?
> Thanks,
> Michael W Miller (
> The Boeing Company MS 17-PE B-XT62
> Propulsion Experimental Hardware 206-655-3289
> Rapid Prototyping 655-4366 Lab 655-4365
> For more information about the rp-ml, see


Regards, Joe DeGuglielmo

For more information about the rp-ml, see

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