Stamperia Ceramic Powder Extra Light (FC04/400) (1 ratings) £4.99 SORRY THIS ITEM IS CURRENTLY OUT OF STOCK - PLEASE CHECK BACK AGAIN SOON. Ceramic Powder Extra Light 400g Suitable for artistic models and moulds. Water/ powder ratio: 800ml:1kg. Hardening time: 20-40 minutes, or more in case of addition of essences. Works with any moulds.