When it comes to make-up there are some basic rules all women should be aware of. Yet only a fifth of them follow these says a research. A group of women was given a list of make-up rules and was asked which ones they knew only one in five had heard of all the tips. The experts of hair care brand Hairtrade.com share make-up guidelines all women should know. Only apply foundation to certain parts of the face: You may think you need to apply foundation to every area on your face but this isn t the case. Foundation is