A black and white negative film in a glassine protective sleeve. An Ilford Delta 400 was used here, my standard black and white negative film in the 1990s.
Ilford writes about this film:
"When it was launched, the ILFORD 400 DELTA revolutionized black and white photography and was therefore voted“ Europe's black and white film of the year 1991/92 ”. Its new“ core-shell ”crystal technology enabled a hitherto unknown, extraordinary image quality. Outstanding sharpness and fine grain of the negatives amazed experts and photographers alike. "
"Despite their scale-setting properties, both films could be improved even further. In order to make this externally recognizable, the product name was extended by the addition of" PROFESSIONAL ". The 100 DELTA PROFESSIONAL and the one that has just been improved and therefore now differ from their predecessors renamed DELTA 400 PROFESSIONAL through the following improvements: - the sharpness of the negatives is a little higher, - underexposures are better tolerated, - the image quality suffers less with forced development (push development, see section 4.1), - the selection of suitable developers is greater. "
"Despite their scale-setting properties, both films could be improved even further. In order to make this externally recognizable, the product name was extended by the addition of" PROFESSIONAL ". The 100 DELTA PROFESSIONAL and the one that has just been improved and therefore now differ from their predecessors renamed DELTA 400 PROFESSIONAL through the following improvements: - the sharpness of the negatives is a little higher, - underexposures are better tolerated, - the image quality suffers less with forced development (push development, see section 4.1), - the selection of suitable developers is greater. "