a green Chameleon Pen's ink progressively goes from light green to dark green as the ink is applied to the paper. The same group is now back with Chameleon Pens Color Tops, that change between two ...

eventually bolstering their numbers to the point where they finally appear green, thanks to all that chlorophyll. On the artistic side of things, the Living Ink material in the pens also contains ...

the head teachers should use only black ink pen to put signatures on the secondary school leaving certificates, as other inks could cause blurring of signature in Xerox copies and the green-ink ...