For example, iron-gall ink, commonly used on ancient documents, is transparent to infra-red light and most visible in the ultraviolet region of the spectrum.
Rite Aid's changing of the guard came on a positive note Wednesday, accompanying a first-quarter earnings report that included less red ink than analysts anticipated.
The Grizzlies have been bleeding red ink for the past decade, but are coming off back-to-back playoff appearances that helped bump attendance up 7% last season.
The company attributes the red ink to expenses associated with the cost of listing on the American Stock Exchange and complying with the Sarbanes-Oxley Act, as well as development expenses in Kazakhstan.