Adding extra white pigment to white paint actually DOES make it whiter!
It’s perfectly acceptable to add more white tint to white undercoat or primer for example to get better coverage.
A bright glossy white finish naturally looks ‘whiter’ than a matt finish, shiny surfaces reflect light, duller surfaces absorb light.
Check out the lighting! White light gives a colder sharper feel as well as brightens.
Have a strong contrast right next to your whites! Something inky, moody, dramatic will make that white shimmer!
As an artisan painter we pride ourselves in getting that white just right! RAL 9016 Traffic White is a favorite of mine – a bright white it has black and yellow pigment in it too.
Another firm favourite RAL 9010 Pure White has black, yellow and a dash of magenta.
It’s alright to know your whites……….