There are two reasons for this. One is that our eyes are much less sensitive to blue light – peak sensitivity is in the yellow-green region of the spectrum, so if all markers were of equal intensity, ...

There are times in the world of signage and labeling when nothing short of a bold, indelible line will do. The right tool for the job is a permanent marker, which works on a number of surfaces (paper, ...

Which permanent markers are best? When you want your writing to last, you need permanent markers, which come in a variety of colors, tip sizes and tip shapes. Although they can be used on paper, they ...