Easy to use - once your project is finished, you just need to 'charge' the pigments with a lamp or sunlight and watch it magically begins to glow in the dark. The slime dye can be charged more quickly and densely using the UV lamp Big pack size 40g green long-lasting generous pack of glow in dark pigments can bring gorgeous glow to your art projects. Each pigment comes in an individual shake jar, which make it easier to use and control with no waste or mess Multipurpose - want to make your crafts more stunning add luminous pigment powder to slime, nail art, epoxy resins, bath bombs, paintings, water based mediums like acrylic paints, and watch them with amazement to burst into a powerful glow in the dark