1983 Photomicrography Competition

Coating process defect caused by a yellow image dye aggregate in a Polaroid color negative

Edmund Montello

Affiliation
Polaroid Corp.
Waltham, Massachusetts, USA
Technique
Kohler Illumination
Magnification
26x

Urea, ferric chloride, citric acid with phenol red, from 70% ethanol

Rahn Kollander

Affiliation
University of Minnesota
St. Paul, Minnesota, USA
Technique
Brightfield
Magnification
23x

Defect caused by a surface tension imbalance of the coating fluids of a Polaroid color negative

Edmund Montello

Affiliation
Polaroid Corp.
Waltham, Massachusetts, USA
Technique
Kohler Illumination
Magnification
26x