Old 26th Aug 2009, 04:20 PM   #1
Davide_sd
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Default Dirt effect name

Hi all,
i have a 'stupid' question; look at the pic in the attachment, i've selected with green color a vertical dirt effect...i don't know if it has some specific name.
If you know, please let me know!
Thank you in advanced!
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Old 26th Aug 2009, 06:52 PM   #2
tobian
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As far as I know that's just water staining, caused by water trickling down from sills and ledges. You often see it on buildings, underneath windowsills. Not sure if it has a proper name though
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Old 26th Aug 2009, 07:38 PM   #3
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Looks like a combination of a couple of things.

First, hard water stains. These are caused when calcium dissolved in water is left behind after the water evaporates.

Second, verdegris. The green color is typical of the corroded products of copper-based metals. If there is no immediately obvious source for this - copper, brass, bronze parts - then whatever water carried the calcium was likely very high in copper as well as calcium.
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Old 27th Aug 2009, 03:58 AM   #4
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Thanks for the replys!
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Old 27th Aug 2009, 02:15 PM   #5
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I would thestreaking a vertical weathering pattern
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Old 27th Aug 2009, 03:50 PM   #6
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i've just found: in a metal surface it's called 'metal leaking'.
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