The colour we see is a result of the wavelengths reflected or directed to our eyes. To understand how this works in highlighter pens, we can compare them to ordinary ballpoint pens. When light ...

Buy now £19.00, Cult Pens BIC Grip Highlighter Pastel Assorted ... in a myriad of kaleidoscopic colours, these fabulous highlighters work on all types of paper. The pen’s uniquely shaped ...