Make highlighting and colouring fast and easy with Robert de Soto. Robert de Soto iFoil Pre-Folded Pop-Up Hairdressing Foil in Silver 18 Micron is an ultra-efficient, cost-effective colouring solution. Containing 550 sheets of 18 microns each, the convenient tissue box style dispenser is a breeze to use. Each sheet simply pops up - no cutting, no hassle. Each sheet measures 12cm x 28cm. Used by salons worldwide.