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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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White paint discolouration
3 months ago I painted a south facing window-cill with Dulux Brilliant
white non-drip gloss. Now I notice that where there are items on the window-cill the paint has discoloured underneath them...Has anyone got any ideas as to why?? -- Posted via Mailgate.ORG Server - http://www.Mailgate.ORG |
#2
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White paint discolouration
"Lawrence Zarb" wrote in message news:79f0dbd51717eaf0b9e9202f98e08834.52329@mygate .mailgate.org... 3 months ago I painted a south facing window-cill with Dulux Brilliant white non-drip gloss. Now I notice that where there are items on the window-cill the paint has discoloured underneath them...Has anyone got any ideas as to why?? If it was plant pots on the window sill, then the acids and salts from the soil will make loverly marks in the paint. If it was just ornaments and things, then it more than likely been polish or cleaning fluids that have stayed under them and not been wiped away. Or it could be that the surrounding area is bleached by the sun more than the areas that were covered by the items. --- http://www.basecuritysystems.no-ip.com Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.515 / Virus Database: 313 - Release Date: 01/09/03 |
#3
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White paint discolouration
3 months ago I painted a south facing window-cill with Dulux Brilliant
white non-drip gloss. Now I notice that where there are items on the window-cill the paint has discoloured underneath them...Has anyone got any ideas as to why?? Solvent paints often change shade over time, particularly in response to UV radiation from the sun. Consider using water based paints which generally seem to suffer less from this. Christian. |
#4
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White paint discolouration
Stephen Hull wrote:
In message lgate.org "Lawrence Zarb" wrote: 3 months ago I painted a south facing window-cill with Dulux Brilliant white non-drip gloss. Now I notice that where there are items on the window-cill the paint has discoloured underneath them...Has anyone got any ideas as to why?? [snip] Sounds daft and I can't explain why but areas kept in the dark appear to turn yellow very quickly indeed. Oil-based paints need UV to *not* yellow; sounds illogical (at least to me) I know, but we have a bookcase in the corner of the room with some books on top. Where the taller books covered the dado rail the paint yellowed. Removed the books and it turned white again! Read this reply by Max Bone (of Decorating Direct) in this very NG http://tinyurl.com/ms4p Paragraph beginning, "This is an alkyd formulation...." I don't think Dulux is quite as good as it used to be, if it ever was that is. Steve. |
#5
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White paint discolouration
Stephen Hull wrote:
Excellent information there, You learn something everyday, It certainly explained to me why paint goes yellow sitting in the dark. So all that you, and/or the OP, need to do is to train SWMBO to re-arrange the plant/ornament display on the window sill every time she dusts :-) /me dons flameproof suit |
#6
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White paint discolouration
This is probably an old wive's tale, and I have certainly never tried it, but I
was told if you add a small amount of BLACK gloss paint (e.g half a teaspoon full) to the white gloss and then mix it very well, it will never discolour. Haven't got the heart to try it myself, but maybe someone here and confirm or deny. |
#7
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White paint discolouration
In message
Parish wrote: Excellent information there, You learn something everyday, It certainly explained to me why paint goes yellow sitting in the dark. So all that you, and/or the OP, need to do is to train SWMBO to re-arrange the plant/ornament display on the window sill every time she dusts :-) /me dons flameproof suit Good point, I'll just blame the Wife for leaving plant pots on the window sills. Sounds daft and I can't explain why but areas kept in the dark appear to turn yellow very quickly indeed. It's not a bug, it's a feature, according to Max Bone http://groups.google.com/groups?&sel...Bx%40maxmaxmax. Obviously not one you would encounter in your main painting. Absolutely and I've saved his post for future reference This is probably an old wive's tale, and I have certainly never tried it, but I was told if you add a small amount of BLACK gloss paint (e.g half a teaspoon full) to the white gloss and then mix it very well, it will never discolour. Haven't got the heart to try it myself, but maybe someone here and confirm or deny. Anyone tried this to confirm if it actually works?. Steve. -- Vehicle Painting Pointers: http://www.stephen.hull.btinternet.co.uk Coach painting tips and techniques + Land Rover colour codes StrongARM Powered Risc PC 600, 80Mb + 2MbVram, RISC OS 4 Using a British RISC Operating System 100% immune to any Windows virus. |
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