Why yellow highlighter will not appear when using photocopier?
The yellow highlighter color is a very pale and light shade of yellow and is very close to the color of white and is not easily picked up by copiers unless the copier is a fairly high end color copier set to a fairly high resolution and set to photo mode so that it looks more closely for slight color variations in the original copy than a standard copy mode will. Also, the yellow highlighter color is a rather difficult color to reproduce on color equipment unless it is a fairly bright yellow highlight that is a little darker and brighter than most yellow highlighters. Most any very light & pale color will be hard to copy. Best of luck.