This part of ISO/IEC 8441 specifies requirements for unrecorded magnetic tape designed for high density digital recording (HDDR) having the following characteristics:

• nominal thickness 25,4 μm (0,001 in);
• longitudinal magnetic orientation;
• coercivity 72 kA/m (900 Oe) max.

These tapes are suitable for interchange in accordance with ISO/IEC 8441-2.

Requirements for packaging are also included.

Annex A gives guidance on glass and metal-flanged reels. Annex B gives information on the wear of recording heads. Different categories of environmental conditions and their effects on tape are dealt with in annex C. Severe operating conditions are considered in annex D. Surface electrical resistance testing is dealt with in annex E. A tape abrasivity testing technique is described in annex F. A list of bibliographical references is given in annex G.