UV Rays and Resin'd stones

blaight · Posted: Fri Apr 20, 2007 1:30 pm Post subject: UV Rays and Resin'd stones

Howdy,
Was searching some past posts and read where if you store your slabs outside the Suns UV Rays could cause resined stones to start to flake. If thats the case...what about stones that are placed in a home in a high sunlite exposure area??? Should I be alerting the consumer to this?
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Brian Laight
Hard Rock Granite
Salmon Arm, BC.
250-832-4341

Mark Meriaux · Posted: Fri Apr 20, 2007 1:40 pm Post subject:

Flaking? Haven't heard of that one, but color-changing.....yes. As for color-changing/fading, technically it CAN happen. I've seen some pics of slabs that were badly affected, but those were from over two years ago.

I store (resined) slabs outside, and have yet to see it occur on any materials that I keep. I don't know if the resin/chemists have added UV stabilizers recently or what?

Bottom line.........it COULD happen, but "devastating" effects of fading are few and far between (IMO). Stone (both resined and unresined) can change color over time due to UV exposure (and/or oxidation and/or "patina" from regular use). I don't think that it's anything I would worry enough about to mention/disclaim to a customer.
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Mark Meriaux, SFA/MIA
The Granite Shop
http://www.thegraniteshop.net/

dknowlton · Posted: Fri Apr 20, 2007 6:26 pm Post subject:

Most homes these days have windows with low-E glass which blocks some UV rays.
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D. Knowlton - Owner
The Top Shop LLC
(860)533-0510

Boyd · Best Friend Joined: 16 Sep 2005 Posts: 621

For the same reason that EG [engineered gravel] can't be stored outside, natural stone with large voids filled with with resin can't be trusted either.
Both contain resins with no UV inhibitors. Per Tenax, the inhibitors cost more so neither the natural stone producers nor the EG people use it.
I've seen Crema Chianti with large resin-filled voids begin to flake and discolor from the sun. The top slab was trash. The bottom ones were OK.
The amount of resin found in most slabs is minimal, so it is not an issue.
Can it happen? Yes. Is it anything to be overly concerned about? Not really.

Boyd, SFA

ash20ash · Posted: Wed Jul 25, 2007 1:47 am Post subject:

Had some tropic brown the other day that I was hoping was just water logged from setting out side. Come to find out it was fadded. Had the outline of the small remnant that was leaning on it. This slab appeared to be resined alot more than normal. Had alot of pits that appeard they tried fixing a crappy slab with resin. Anyway this is the first time I,ve had a problem with resin slabs being outdoors. In all my" 9 months" of fabbing I might add Laughing

Curtis Marburger · Posted: Wed Jul 25, 2007 1:58 am Post subject:

I seen it once came off with steel wool. It was a rem of New Venetian Gold that was sitting around a long time
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Curtis Marburger, SFA
Cornerstone Granite
Elizabethtown PA

http://www.homesforourtroops.org/

MReenock · Posted: Wed Jul 25, 2007 2:18 am Post subject:

we used to have a few slabs of ubatuba that sat outside and baked for some time, the yellow and gold really came out and it didnt have that dark green color, most people didn't like it but one day a customer came in and bought them, they loved the sun baked look...that might be something in the future....aged slabs...
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Mike Reenock
Premier Granite & Marble
Pen Argyl, PA
610-704-7684

matt rickard · Posted: Wed Jul 25, 2007 2:21 am Post subject:

had it on Autumn Harmony lots of razor blade action and steel wool fixed it as well. live and learn
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Matt Rickard.SFA
Unique Granite & Marble
Owensboro,Kentucky