Every time i paint anything (gloss white) it does not stay white for long, but goes an off white. why?

is it because i don't stir the paint?Every time i paint anything (gloss white) it does not stay white for long, but goes an off white. why?
are you using oil based paint?? oil paint not exposed to sunlight will turn yellow.Every time i paint anything (gloss white) it does not stay white for long, but goes an off white. why?
dust, smoke, outdoor pollution. NOT because you don't stir the paint, though you really should.
If you are using oil based (alkyd) paint it is the laquer that is turning yellow. I had same problem so I got a GOOD QUALITY primer and semi-gloss latex paint. Sanded and repainted and have not had a problem with yellowing and it is just as durable as the alkyd.
Good quality white paint has a lot of suspended solids which contain the color and finish qualities. You should always stir paint in a fashion whereby you bring up the solids on the bottom so they are mixed in. If you can't seem to get a good consistency or suspect there are some solids still on the bottom, bring it to a Lowes, home depot, Walmart or anywhere they sell paint and ask them to put in their mixer. You might want them to check the quality of the paint before you go home so that way if the paint has degraded, you can purchase another gallon and save yourself a trip.
You definitely need to stir your paint in the future. It might be stains that are coming back through your paint. There is a product called kilz that will block these stains, you put it on like paint and then paint over after it dries. I have had this problem and


this product works great. good luck hope this helps
Do you smoke??
It's normal because white attracts dirt, dust, smoke....
There are many shades of white. It depends on weather it is pure white, Navajo white, Swiss Coffee white or any number of shades of white.
Smokers in the enviroment ? Nicotine ! or Grease from cooking enviroment


1st Clean the surface with a professional wall washing


2nd Apply KILZ


3rd Use a non yellowing Gloss White Paint . ( Most reputable brands are non-yellowing )
You are probably not priming the walls or furniture first and the old colors are bleeding through. Yes, you need to stir the paint well so all of the pigment gets distributed well.If you use gas heat, it can trun white to a yellowish tint also.You can wash that to remove it.