Welcome to

Photography in Philately

A Krzysztof K. Słowiński Collection

Home /

Item no. P1402b (postcard)

Item no. P1402b (postcard).jpg Item no. P1402a (postcard)ThumbnailsItem no. P1403 (cover)Item no. P1402a (postcard)ThumbnailsItem no. P1403 (cover)Item no. P1402a (postcard)ThumbnailsItem no. P1403 (cover)Item no. P1402a (postcard)ThumbnailsItem no. P1403 (cover)

Item no. P1402b (postcard)

Type: cover

Country: USA

Date of use: 28 May 1931

Business Reply Mail (postcard, back of) used by the MALLINCKRODT CHEMICAL WORKS in St. Louis (Missouri, USA), a chemical factory (operating since 1867) producing various products, also chemicals for photographic purposes that were described in “Mallinckrodt Photographic Chemicals” (e.g. issue 1943). It was for some time (since 1880) a major producer of bromides for photography. Mallinckrodt published manual (several times reissued) “The Chemistry of Photography” (1931). The card served as an order form for a trial sample of developer PICTOL, one of Mallinckrodt’s “Photo purified” chemicals.

Visits
14082
Rating score
no rate
Rate this photo