Best colour to make paint UV resistant

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    Colour Paint Uv
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Discussion Overview

The discussion revolves around the topic of enhancing UV resistance in paint for wooden window frames. Participants explore potential pigments, binders, and additives that could mitigate UV damage to the paint's binder, as well as the general properties of outdoor or weatherproof paints.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant suggests that using outdoor or weatherproof paint may address UV concerns, noting that UV is a factor these paints are designed to handle.
  • Another participant emphasizes that the color black is determined by the pigment rather than the binder used in the paint.
  • The original poster expresses a desire to block UV damage to the binder and inquires about specific pigments or additives that could be effective in achieving this goal.
  • There is a mention of the potential for replacing titanium dioxide with marble powder, although the implications of this substitution are not fully explored.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the best approach to enhance UV resistance in paint. Multiple viewpoints regarding the role of pigments, binders, and paint formulations remain present.

Contextual Notes

Some assumptions about the effectiveness of different pigments and binders in blocking UV light are not fully substantiated, and the discussion does not resolve the potential trade-offs of substituting titanium dioxide with marble powder.

Puma
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Hi I am looking to repaint my windows. I've noticed that black paint lasts very well generally. I don't really want my windows black. Is there anyway I can reduce uv damage to the binder in the paint by adding some UV blocking colour? I've googled UV blocking pigments but it doesn't seem to come up with anything. Is there some binder I could use which isn't quite so UV absorbing? Also is it worth replacing titanium dioxide with marble powder?

Thanks.
 
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I believe it is just a matter of using outdoor or weatherproof paint. UV is in the suite of things such a paint has to deal with.

When you say you are going to repaint the windows, do you mean the frames? Or tinting the glass? The glass itself ought to be absorbing UV, but that won't effect the outer frame or paint on the exterior surface of the glass.
 
Black color is a matter of pigment, not of the binder.
 
Yes I am painting the frames of wooden windows with exterior paint. The binders in the modern formulations are not lasting that long, and it's very time consuming to paint them every 3 years or so, hence the reason for my looking to improve the longevity of the paint.

I know Borek, you didn't get me for some reason. I want to block the UV as much as possible as it breaks down the binder. I was wondering what pigments / additives would be good for blocking.
 

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