Here's a brand new twist on the red-blue divide that has nothing to do with politics. California psychology professor Abraham Rutchick studied how people use red and blue pens to grade papers. He ...

If your less-than-desirable paper grade is circled in thick red ink, you may have more than just your own poor work to blame. Red ink encourages harsh grading, according to a study recently conducted ...

Pen "Color Picker Pen" which composes ink by color read by sensor and produces it When using a pen, it is necessary to prepare a separate pen such as a red ink pen when red is necessary, a black pen ...

An F is an F, but failure seems so much friendlier when it comes in purple. A growing number of the nation’s educators are stocking up on purple pens (search) for grading papers and passing on the ...

While the concept of applying ink to paper with a stylus can be traced back to ancient Egypt and China, the modern self-contained ink pen is a relatively new invention. Split quills gave way to metal ...

Valentine’s Day prompts an explosion of red in local retail stores, from candy boxes to fresh flowers, greeting cards to lingerie. Red, traditionally used for matters of the heart, also exudes a ...