photometer used for 1st edition of Photolatente envelopes

How are the latent imprints made?

A photometer is used with the enlarger to indicate average density and exposure. The use of standard development techniques under normal conditions will allow a viewing of the image. Once printed and dry-sealed, the paper, together with an instruction leaflet, is introduced into a protective envelope, which in turn goes into a sealed, labelled, opaque envelope.
The author makes no selection from the files of films nor needs to view the contents of the negatives. The strips of negatives are randomly extracted from the files and all the process is developed in a semi-automatic way. After the imprint, the negatives are destroyed and the envelopes are numbered.


Photo: photometer used for 1st edition of Photolatente envelopes