D MOST important keyword kat sini is :
OIL & WATER DO NOT MIX !!!
jadi, mksudnya..utk buat foundation thn lebih lama, kena tawu sedikit info psl moisturiser/primer n foundation yg digunakan.samada it is WATER or OIL - based..jika moisturiser/primer anda ialah water-based dan foundation anda oil-based, it is not compatible dn foundation yg oily-based akn slide over the moisturiser/primer on ur skin dn x akan thn lama..n begitulah sebaliknya..
jd, seeloknya guna moisturiser/primer yg WATER-BASED dgn foundation yg WATER-BASED or moisturiser/primer yg OIL-BASED dgn foundation yg OIL-BASED jugak..
camna nk tawu whether d product is water or oil-based? baca label dkt kotak/jar/packaging etc dulu.if the product is meant to be for oily skin, then it is WATER-BASED. dn foundation yg slalunya beri effect cam bkilat/dewy finish to the skin is normally OIL-BASED
jadi, sebelum menyalahkn foundation yg xthn lama, kita kena check dulu content dkt product tersebut.tgk main content dkt product.slalunya yg 3/4 kandungan yg pertama.dr situ, boleh tgk whether it is oil or water-based.
n one more IMPORTANT thing, dont load products on ur skin. guna mngikut keperluan kulit..jika kulit anda jenis bminyak, u can just skip moisturiser. jika kulit jenis yg kering, guna moisturiser n primer sahaja then foundation. jika kulit jenis combination, just guna moisturiser pada kawasan yg kering sahaja.
*tips dr GOSSMAKEUPARTIST from UTUBE ..
