The fading process is rather complicated in practice because oxygen also comes into the process, as does water.

As the fading process continues, the black "fades" away, leaving a more vibrant and beautiful color, usually yellow or red.

Daylight and fluorescent light, which are high in ultraviolet, accelerate the fading process.

This fading process also requires reduplication every few months in a typical office for any project using bluelines.

The color usually fades over time, and gentle heating, combined with oxygen, accelerates the fading process.

Dr. Kest said exfoliating speeds up the fading process.

It seemed to roll into the folds of the garment it regained and it was gone again with a fading process that almost matched The Shadow's.