1. Semitransparent black toner darker than RZ-E21. 2 . When applied RZ-E24 alone without any other additive toners, this toner can be used to achieve a deep black color with a greenish hue (the total absence of redness) with a very dark flop. 3 .When you add RZ-E24 to metallic color, it will be a very strong tarnishing to the flop, and much lesser extent to face.