ISBD(NBM) - IFLA

5.2 Other physical details
5.2.1 The second element of the physical description area is a statement particularizing other
physical characteristics of the item, excluding dimensions. Any characteristic implicit in the specific
material designation is omitted; for example, the characteristic "sd." (see 5.2.7) is not given for a sound
recording. The specifications constituting other physical details are presented as appropriate in the
following order.
5.2.2 Statements relating to the material of which the item is composed.
e.g.
. – 1 sound reel (27 min.) : paper
. – 1 model (4 pieces) : polystyrene
. – 1 diorama : various materials
. – 1 microfilm reel : diazo
. – 1 film reel (11 min.) : nitrate
Such statements are optional except for material requiring particular equipment.
5.2.3 Reduction ratio (microforms)
5.2.3.1 An indication of the reduction ratio is given for microforms having a reduction outside the
standard range 16x-30x. Where possible the ratio is expressed numerically.
e.g.
. – 1 microfilm reel : diazo, 14x
. – 6 microfiches : silver halide, 150x
5.2.3.2 The terms "low reduction" (up to 15x ), "high reduction" (31x –60x), "very high reduction"
(61x-90x) and "ultra-high reduction" (91x and upwards) or their equivalents in other languages and/or
scripts are used in cases where the reduction ratio cannot be specified exactly.
e.g.
. – 3 microfiches : ultra-high reduction
5.2.4 Mode (microforms and filmstrips)
For microfilm reels and microfilm slips a statement of frame alignment is given.
e.g.
. – 1 microfilm reel : cine mode
. – 3 microfilm slips : diazo, comic mode
Frame alignment may also be given for filmstrips.
e.g.
. – 1 filmstrip (42 double fr.) : comic mode
5.2.5 Illustration statement
5.2.5.1 For original publications in microform, illustration statements are given in accordance with
the provisions of the ISBD(M) (q.v.). For microreproductions, illustration statements are given (where
appropriate) in a note (see 7.2).
5.2.5.2 Other visual materials for which the ISBD(NBM) is intended have illustration as an almost
invariable property. For these materials accordingly no statement regarding the presence of illustrations is
made. However, the presence of particular types of illustration and their number may be indicated.
e.g.
. – 24 slides : facsim.
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