For Industrial Purpose. These should not be used for cosmetics.INCI: Potassium Nitrate (CAS# 7757-79-1)
Sodium Nitrate (CAS# 70356-09-1)
Azobenzene (Butyl Methoxydibenzoylmethane) (CAS# 70356-09-1)
Off white free flowing powder that turns red when exposed to sunlight.
Photochromic Pigments react to changes in light levels and are activated by Sunlight. Photochromic pigments will not fade in UV light, as they are dependent on UV for activation. You will not see a color change with indoor lighting only UV (Sunlight). They have several industrial applications such as graphic art, plastics, invisible inks and paints.
Photochromic Dyes can be extruded, injection molded, cast or dissolved into an ink. Photochromic dyes can be used in various paints, inks and plastics (PVC, PVB, PP, CAB, EVA, urethanes and acrylics). The dyes are soluble in most organic solvents.
Due to the wide variations in substrates, product development is solely the responsibility of the customer.
Storage and Handling
Photochromic Dyes have excellent stability when stored away from heat and light. A shelf life of excess of 12 months provided that the material is stored in a cool and dark environment. Do not let them freeze as this will affect
Photochromic dyes are sensitive to UV degradation over time.The life expectancy of the dyes depends greatly on the matrix into which they are dissolved, the additives used to stabilize them, and the intensity and duration of UV exposure.
Photochromic dyes can withstand most stan-dard mixing procedures.
Photochromic dyes can be subjected to processing temperatures of 180 C to 240 C without degradation, for a short period of time. Thermal degradation is a function of the combination of time and temperature. The shorter the time and the lower the temperature, the less thermal degradation will occur.