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Posted by on January 8, 2007, 10:29 pm
Hello,
I've been trying to finish up a paint job in our bedroom using a
darker-green American Tradition paint we got at Lowe's. I've put on a
total of three coats now, and it seems like whenever sunlight comes in
through our windows (even if on the otherside of the house; not direct
sunlight) certain areas of the walls become lighter. This is VERY
noticable. Is this a common thing? How can I fix it? I can't just
paint over it because the middle area of the repaint will then be okay,
but the surrounding area of that repaint will then become lighter
during the day. Looks fine at night with all the lights on. What's
the deal?
Thanks!
Garrett
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Posted by BillGill on January 9, 2007, 9:07 am
g.cook.a@gmail.com wrote:
> Hello,
>
> I've been trying to finish up a paint job in our bedroom using a
> darker-green American Tradition paint we got at Lowe's. I've put on a
> total of three coats now, and it seems like whenever sunlight comes in
> through our windows (even if on the otherside of the house; not direct
> sunlight) certain areas of the walls become lighter. This is VERY
> noticable. Is this a common thing? How can I fix it? I can't just
> paint over it because the middle area of the repaint will then be okay,
> but the surrounding area of that repaint will then become lighter
> during the day. Looks fine at night with all the lights on. What's
> the deal?
>
> Thanks!
>
> Garrett
>
What kind of lighting do you use in the room? If you
are using compact flourescents (CFLs) that may be the
problem. They can cause a color change because they
don't have a continuous spectrum, and your paint may
have a tint that they don't pick up.
I remember when I painted my bath room yellow, but
when I tried CFLs in there it turned green. I went
back to incandescents.
Bill Gill
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Posted by avid_hiker on January 9, 2007, 9:22 am
BillGill wrote:
> g.cook.a@gmail.com wrote:
> > Hello,
> >
> > I've been trying to finish up a paint job in our bedroom using a
> > darker-green American Tradition paint we got at Lowe's. I've put on a
> > total of three coats now, and it seems like whenever sunlight comes in
> > through our windows (even if on the otherside of the house; not direct
> > sunlight) certain areas of the walls become lighter. This is VERY
> > noticable. Is this a common thing? How can I fix it? I can't just
> > paint over it because the middle area of the repaint will then be okay,
> > but the surrounding area of that repaint will then become lighter
> > during the day. Looks fine at night with all the lights on. What's
> > the deal?
>
Would you be using gloss paint? Gloss paint will reflect more white
light. Where if non-gloss the white light would be absorbed more.
You have to study the color spectrum and how our eyes see colors to
understand why green is green, etc. Sunlight is all colors, blue,
green, red, etc. For the color green, every color is absorbed except
the green which is reflected back at your eye.....then you see green.
If lighter during the day, this means more white is being reflected
together with the green.
Like the person above stated that bulbs, lamps, do not put out a true
color spectrum as sunlight......so the colors look different to our eye
at nighttime. Hope you kinda understand this........but wishing you the
best in solving your particular problem.
Dean
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Posted by dadiOH on January 9, 2007, 2:05 pm
avid_hiker wrote:
> Would you be using gloss paint? Gloss paint will reflect more white
> light. Where if non-gloss the white light would be absorbed more.
>
> You have to study the color spectrum and how our eyes see colors to
> understand why green is green, etc. Sunlight is all colors, blue,
> green, red, etc. For the color green, every color is absorbed except
> the green which is reflected back at your eye.....then you see
> green. If lighter during the day, this means more white is being
> reflected together with the green.
Close but no cigar...something of a given color, regardless of gloss,
isn't reflecting *any* white because - as you stated - the other
colors necessary for white light are being absorbed by the colored
surface.
If, as you suggest, the surface were glossy the OP *might* be seeing a
specular reflection (a reflection of the light source itself) which
would be whatever color the source was. Such a reflection is the same
regardless of the color of the underlying surface and depends both on
the "reflectability" of the surface and the angle at which light
strikes it relative to the viewer.
--
dadiOH
____________________________
dadiOH's dandies v3.06...
...a help file of info about MP3s, recording from
LP/cassette and tips & tricks on this and that.
Get it at http://mysite.verizon.net/xico
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Posted by Jennifer on January 9, 2007, 9:32 am
g.cook.a@gmail.com wrote:
> Hello,
>
> I've been trying to finish up a paint job in our bedroom using a
> darker-green American Tradition paint we got at Lowe's. I've put on a
> total of three coats now, and it seems like whenever sunlight comes in
> through our windows (even if on the otherside of the house; not direct
> sunlight) certain areas of the walls become lighter. This is VERY
> noticable. Is this a common thing? How can I fix it? I can't just
> paint over it because the middle area of the repaint will then be okay,
> but the surrounding area of that repaint will then become lighter
> during the day. Looks fine at night with all the lights on. What's
> the deal?
It's just how paint behaves, as far as I can tell. I've seen it with
different brands and colors, though some colors don't seem to be
affected as much. For me, it has nothing to do with using CFLs... the
color change comes when it goes from diffuse ambient light to sunlight
streaming through the room. My hallway goes from soft butter yellow to
lemon yellow (blech) and my office goes from pale slate green to a
strange candy-colored greenish-blue. After the first few weeks of it
bothering me, I pretty much stopped noticing it :)
So that's my vote... ignore it, and eventually it will stop bothering
you. Or keep experimenting and find a color that at least changes to
another color you like when the light hits it. FWIW, Benjamin Moore
Stone House, Nantucket Fog, and Palladian Blue don't seem to do much,
if any, color changing in any light. I used three colors of American
Traditions paint in my old house, too, and none of those did a
noticeable color change, but I no longer remember the names of the
shades.
Good luck!
--
Jennifer
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