Abstract: A recording medium cartridge which is capable of preventing a drop in aesthetic quality by preventing damage to a printed layer for writing during ultrasonic welding is presented. As a printed layer (20), a writing-enabling filler (21), and resin particles (22) having an average particle diameter equal to or greater than the average particle diameter of the writing-enabling filler (21) mentioned above are included in an ink (23). The resin particles (22) come into contact with a welding horn (9), and prevent the writing-enabling filler (21) from falling out or changing shape due to ultrasonic vibration.

Abstract: In a magneto-optical disc contained in a cartridge, a first dielectric layer, signal recording layer, second dielectric layer, and light reflecting layer are sequentially stacked on a substrate having formed grooves, and a first protective layer, print layer using at least one color and second protective layer are sequentially stacked on the light reflecting layer. Thickness of the second protective layer is not smaller than that of the print layer, and thickness of the first protective layer is not smaller than 2 &mgr;m. Thus the recording medium having the print layer on at least one surface maintains a sufficient resistance to corrosion and a good slidableness.

Abstract: A tape cassette having such a structure that a pattern is printed on a surface of a transparent or semi-transparent cassette housing, a scale display portion which becomes a yardstick for a remaining volume for a tape is formed on the lowest layer of this pattern printing portion and this scale display portion can penetratingly be seen from a surface of an opposite side of the cassette housing.

Abstract: A cassette storing a recording medium therein and having an opening for recording information on and/or reproducing information from the recording medium therethrough, or a storage case for storing such a cassette has, on its outer surface, a label area made of a phosphorescent material for allowing information to be written with a writing instrument.

Abstract: An information recording medium, a storage case for storing an information recording medium, or a sheet for use with an information recording medium, has a light-emitting area coated with a phosphorescent paint, and a luminous paint area coated with a luminous paint for emitting exciting light to stimulate the light-emitting area to emit light, the luminous paint area being disposed adjacent to or on the light-emitting area.

Abstract: A recording medium urging pad can urge a recording medium such as a magnetic tape against a recording and reproducing head stably and reliably. A head pad (10) fixed to a supporting member such as a leaf spring (9) comprises a first layer (10a) with a low elastic modulus contacting with a magnetic tape (T) and a second layer (10b) with an elastic modulus higher than that of the first layer (10a) fixed to the leaf spring (9), wherein a thickness (Ta) of the first layer (10a) and a thickness (Tb) of the second layer satisfy the following equation expressed as: ##EQU1## and the first and second layers (10a) and (10b) are bonded by an adhesive (10c).

Abstract: A cassette storing a recording medium therein and having an opening for recording information on and/or reproducing information from the recording medium therethrough, or a storage case for storing such a cassette has, on its outer surface, a label area made of a phosphorescent material for allowing information to be written with a writing instrument.