Painting over light purple matt emulsion

[stev1962]

Hi Everyone,
I have just started painting white matt emulsion over light purple in my bathroom and I am now on my third coat without the end in sight! Its just not covering it. Should I be using another sort of paint? This dulux matt emulsion just doesn't seem thick enough. Can anyone advise me please. help?
Steve

[JRS]

Most reds, purples and blues have die in them meaning its harder to cover.3 coats should be sufficient. If not try undercoat and 2 coats of white matt. Crowns covamatt is great for this aswell.