Apply a generous (2-3 mm thick) layer over the area to be tattooed. While applying, the layer should not be rubbed in, as you would do with a moisturizer; rather, a thick layer should be applied so there is a visible film across the skin. Leave the cream on for at least 60 minutes (up to 90 minutes is fine). Resist the urge to keep checking on it – the more it’s left alone, the better it works.