Skin-tanning liquidhow to use:use the brush supplied with the package to apply evenly to areas of the skin to be darkened.allow vitinorm to remain on the skin for at least 30 minutes before washing out.to avoid over application, use once at bedtime and allow colour to develop overnight.sun exposure: the tan acheived with vitinorm alone doesn t protect skin from sunlight (use sunblock on the affected areas to gain sun protection effect).