Natural Kaolin White Clay Lightens Sun Tan and Marks and Blemishes. All skin types can use kaolin powder for skin and because it is a completely safe powder it can be used throughout and lactation. Since it has ifying properties it cleans pores and ifies skin. skin oiliness When applied to skin the thin light clay known as kaolin has inherent absorbency properties. To Its Credit This Superb Natupure Kaolin Clay Powder Has No Adverse Effects.