Expressive quilts / Kumiko Sudo ; [illustrations by Michiko Sanford ; photography by Roland Hanselmann]. (OCLC #21077233)

The hybrid AACR2/RDA record for this piece has physical description:

300 __ ǂa 96 pages : ǂb chiefly color illustrations ; ǂc 28 cm

The physical details recorded in ǂb suggest that the volume is primarily made up of color illustrations; this is different from “illustrations (chiefly color)”, indicating that the illustrations (which are secondary) are mostly in color (described in RDA on Recording Color Content).

I did not find an RDA rule for recording that a volume is “chiefly illustrations” (that would be similar to AACR2 2.5C5); this may be because it can be more precisely recorded in the Content Type:

300 __ ǂa 96 pages : ǂb color ; ǂc 28 cm
336 __ ǂa still image ǂb sti ǂ2 rdacontent
336 __ ǂa text ǂb txt ǂ2 rdacontent

(including that second one depending on how much text is in there among the image content, which is primary.)

I notice that even for books that are “all illustrations”, records tend to still include the word “illustrations” in 300ǂb. (What do you think – should it be there?)

Many catalogers also include a note like:

500 __ ǂa Chiefly illustrations.
500 __ ǂa All illustrations.

The techniques of astral projection : dénouement after fifty years. (OCLC #7303468)

OCLC has records using many standards; not just RDA and AACR2 but also some non-ISBD. For example, this record has fixed field Desc indicating that it is non-ISBD:

Desc: _

and indeed, some fields have no (or little) punctuation as markup:

300 __ ǂa xxiii, 111 pages ǂc 22 cm

but some elements have been upgraded over the time through OCLC’s automated processes (note that “p.” above has become “pages”). Some RDA elements have been added:

  336 __ ǂa text ǂb txt ǂ2 rdacontent
  337 __ ǂa unmediated ǂb n ǂ2 rdamedia
  338 __ ǂa volume ǂb nc ǂ2 rdacarrier

as have FAST headings:

  650 _7 ǂa Astral projection. ǂ2 fast ǂ0 (OCoLC)fst00819371

but the record as a whole has not been upgraded to RDA (not even to non-ISBD RDA) so is still considered a hybrid.