Testing for paint opacity, Balm Paints Research at Clayton, Victoria, 1961 [1] [picture] /

Condition: Good.; Title from inscription on reverse.; "3111AB" and "1961"--Inscriptions on reverse.; "Photograph and archival silver gelatin vintage print"--Stamped on reverse.; Photographer's stamp on verso.; Also acquired as part of collection: Wolfgang Sievers photographic archive.; Also available in an electronic version via the Internet at: http://nla.gov.au/nla.pic-an23122576