I don't really understand oxidising foundation

[HairsprayQueen]

I have Estée Lauder double wear which looks ok when I put it on but after a few hours looks too orange, is this what they mean is oxidising?

Does oxidising mean that the formula will always be wrong for me no matter which shade? For example I could afford to go a shade or two lighter and but would that still go orange or would it be ok as it started lighter?

I really like the formula and finish but obviously can't go round being orange!

Hope this makes sense.

Yes oxidization is when foundation changes to an orange colour on your skin. I think it's caused by the PH level of your skin because a foundation that oxidizes on one person may not change at all on someone else. You might want to try a silicon primer on your skin beforehand, that will act as a barrier between the foundation and your skin's oil.

Ah that's useful thanks- I have a tube of porefessional that I never remember to use so I'll try that tomorrow.

Otherwise if I buy a lighter colour (the one I used today was probably more suited to my summer skin really) in the same range it'll likely do the same because of my skin?