Can Clear/00 be mixed with all the FRAMCOLOR PURE PIGMENT PLUS shades to dilute the intensity of the color?

Yes!

Clear/00 can be used with any of the shades to reduce the intensity without changing the tonal result. When first working with FRAMCOLOR PURE PIGMENT PLUS as toners on very porous/over lightened hair, Clear/00 is recommended to reduce the intensity of the shade, especially when working with the cooler tonalities (/62).