Does using compatible cartridge void a printer’s warranty ?
Answer :

No. US Federa Law prohibits any company or individual from canceling a warranty due to the use of compatible supplies.

Why don’t more businesses use compatibles?
Answer :

Often times the only reason businesses don’t use compatible cartridge is a lack of knowladge. The remanufacturing industry is relatively new, gaining most of its momentum and size in the ate 1990s.