Photobloc is a broad spectrum sunscreen which gives maximum protection against harmful UVA and UVB rays with SPF 50+, thereby providing maximum sun protection. Photobloc is uniquely formulated Tinted sunscreen containing PA ++++ property that means it has a PPD ( Persistent Pigment Darkening ) rating of 16 or higher, enabling maximum protection from UVA rays – The causative factor for Melasma, therefore it is a Next Generation Melasma Sunscreen.