Yellowing gloss

[Steve]

6 years ago i moved into this house and painted all the woodwork a very smelly b&q oil based gloss. Lovely and white it was. I assumed the oil based stuff would be best.

6 years on and I'm preparing the house to sell. How wrong i was about that paint! Ive spent the weekend glossing every door, architrave, door lining, skirting, dado, etc, twice! Because in places the paint has gone a strong shade of yellow. Especially on the doors where things have been hung on the back.

Why does this happen?

The new paint, by the way, is b&q quick drying water based gloss.

And why do they sell the oil based stuff when the water based is better in Every. Single. Way? Or am i missing something?? Cleaning, application, yellowing, smell.

 

[Robbie uk]

Water based has only one quality, doesn't yellow. Since 2010 when the rules changed on oil based paints, certain chemicals have been left out or reduced, hence the yellowing.

 

[Jockstrap]

The reason 4 yellowing not much or none at all natural sunlight getting 2 doors & other woodwork & regarding why oil v waterbased is price waterbased nearly twice the price !

 

[opps]

Oil base paints yellow because of a lack of ultraviolet light.

I you removed the items on the back of the doors, in time the light would eliminate the yellow.

Waterbased paints don't yellow as a result of lack of light but as a professional decorator I consider them to be inferior with regards to quality of finish and durability.

Cleaning brushes? My oil based brushes live in a brushmate, I seldom need to clean them. Waterbased paints, I need to spend 10 minutes a day cleaning them. That is almost an extra hour per week.

Durability- I have a number of factory finished kitchen doors that I need to respray for customers. The base coat is solvent based but the finish coats are waterbased. Fats/grease from fingers makes the waterbased paint really soft and it wears away around knobs/handles/etc, the base coat is fine.

I guess that as a pro, I shouldn't complain. Oil based yellows faster than before, I vet called back more often. Waterbased wears away or chips, I get called back more often.

Cost differentials? I was told by Ray Mann merchants in Fulham that they have theirs made in Iceland because the process needs a lot of electricity, and Iceland has cheap hydro electricity.