Paint drying darker than rest of wall...

[FP]

I painted a wall a month ago with a dark green latex based paint (Behr, sold at Home Depot). The paint is high quality and the wall was TSP'd, primed and then painted with 2 coats.

About a week ago I accidentally dropped a heavy object into the wall and had to patch up the indentation. No problem. However when I painted over the patchwork (same can of paint as the original job) with 2 coats of the same paint the section I painted (larger than just the patch portion) is now slightly darker than the rest of the wall. It has been about 6 hours since I painted the wall.

Anyone have any ideas why this is happening? Does the paint need more time to dry (it is dry to touch). I really don't want to paint the entire wall again, such a hassle. Any tips or ideas are appreciated.

 

[Fullmetal Chocobo]

Mixed just a bit differently.... It settles as you paint, and this can cause changes in the mix....
Tas.

 

[villageidiot111]

Maybe it already faded a bit?

 

[Brian23]

time to end yourself

 

[DainBramaged]

Just paint the whole thing over again. Problem solved.

 

[bootymac]

Probably something to do with fading

 

[JRock]

Maybe could be thickness/consistancy of the new section of drywall? Maybe not absorbing as much paint?

 

[Injury]

It may not FULLY dry for a good day or so, it may be dry to the touch, but that doesn't imply that all the liquid content has FULLY evaporated... especially in a laytex paint. (Even cheap ass poster paint takes a couple hours to fully dry.) But my guess would be that you didn't have the paint shaken up, and the paint/coloring had seperated a bit since you painted last... the coloring heading more towards the top where you probably dipped a brush.

Also, if you used a roller one time and a brush or something another time, it's REAL easy to have it a bit thicker in one spot.

Is the darker area EXACTLY where the patch work was done, or everything that was painted?

If if bothers you that much, just re-paint that section of wall. You probably won't notice a difference to the other walls unless it's just THAT much darker.

 

[Ketteringo]

:camera:?

 

[FP]

The darker area covers the entire new area I painted which is much larger than just the patched area.

I think tasburrfoot78362 is right. I shook the can before I used it but only by hand. I didn't use a can shaker. Oh well, looks like I have paint the whole wall again.

 

[shortylickens]

Originally posted by: tasburrfoot78362
Mixed just a bit differently.... It settles as you paint, and this can cause changes in the mix....
Tas.

Yup. As a general rule, when its been a long time between paint jobs, (months, years) its best to do it all at once.
Also, if I know I will be using many gallons, I prefer to take ALL of the paint and dump it together in a 35 or 55 gallon drum and mix it all up real good.
Can-to-can, not all paint is exactly the same. There can be slight variations in color that are noticeable on your wall when dry.

 

[ManyBeers]

Paint the whole wall again.