Ink ribbon cartridge

A combination of a package, an ink ribbon unit, a holder for an ink ribbon cartridge and printing paper, comprising:

• said ink ribbon unit having a pair of spools on which an ink ribbon is wound, said ink ribbon unit having means for removably mounting said unit into said holder of an ink ribbon cartridge, and an end portion of said pair of spools having a predetermined color indicative of a characteristic of said ink ribbon;
• and
• plural sheets of printing paper, an amount of which corresponds to a capacity of said ink ribbon;
• said package and said holder each having a color portion of the same color as said end portion of the pair of spools.

An ink ribbon cartridge comprising:

• an ink ribbon unit having
• an ink ribbon and a spool member on which said ink ribbon is wound, said spool member including a first identifying portion to identify the type of said ink ribbon wound thereon;
• and
• a holder to house said ink ribbon unit therein, said holder having
• a base portion, a pair of wall portions facingly extended from said base portion to support said ink ribbon unit by establishing an engagement therewith, a second identifying portion on said holder to identify the type of said holder, said second identifying portion having the same appearance as the first identifying portion, and means on said holder to be detected by a printing device for identifying the type of ribbon therein.