Technical Data Sheet

ManualsBrandsIlford ManualsFilmDelta 100 Professional Black and White Negative Film

Page 1 of 6 No

2018

HARMAN technology Limited

TECHNICAL INFORMATION

DELTA 100

PROFESSIONAL

ISO 100/21º, FINE GRAIN, BLACK AND WHITE

PROFESSIONAL FILM FOR SUPERB PRINT QUALITY

ILFORD Delta 100 Professional is a medium speed, fine grain, black and white film, ideal for pictorial and

fine art photography.

Delta 100 Professional 35mm film is coated on 0.125mm/5-mil acetate base and is available in 24 or 36

exposure cassettes, or in bulk lengths of 30.5 metres (100ft). Delta 100 Professional 35mm film is supplied in

DX coded cassettes, suitable for all 35mm cameras.

Delta 100 Professional rollfilm is coated on 0.110mm/4-mil clear acetate base

with an anti-halation backing which clears during development. It is available in

120 lengths and is edge numbered 1 to 19.

Delta 100 Professional sheet film is coated on 0.180mm/7-mil polyester base

with an anti-halation backing which clears during development. It is available in

a wide range of standard sizes. The emulsion faces the user when sheet film is

held in the position shown opposite.

EXPOSURE RATING

Delta 100 Professional has a speed rating of ISO 100/21º to daylight. Best results are obtained at EI 100/21,

but good image quality will also be obtained at meter settings from EI 50/18 to EI 200/24.

It should be noted that the exposure index (EI) range recommended for Delta 100 Professional is based on a

practical evaluation of film speed and is not based on foot speed, as is the ISO standard.

SPECTRAL SENSITIVITY

Wedge spectrogram to tungsten light

(2850K)

Summary of content (6 pages)

PAGE 1
HARMAN technology Limited TECHNICAL INFORMATION DELTA 100 PROFESSIONAL ISO 100/21º, FINE GRAIN, BLACK AND WHITE PROFESSIONAL FILM FOR SUPERB PRINT QUALITY ILFORD Delta 100 Professional is a medium speed, fine grain, black and white film, ideal for pictorial and fine art photography. Delta 100 Professional 35mm film is coated on 0.125mm/5-mil acetate base and is available in 24 or 36 exposure cassettes, or in bulk lengths of 30.5 metres (100ft).
PAGE 2
DELTA 100 PROFESSIONAL Technical Information FILTER FACTORS Delta 100 Professional film may be used with all types of filters (eg colour, polarising and neutral density filters) in the usual way. Follow the instructions given by the filter manufacturer. The exposure increase in daylight may vary with the angle of the sun and the time of day. In the late afternoon or the winter months, when daylight contains more red light, green and blue filters may need slightly more exposure than usual.
PAGE 3
DELTA 100 PROFESSIONAL Technical Information DEVELOPMENT TIMES The table below gives development times for both manual and machine processing Delta 100 Professional. These times will produce negatives of average contrast suitable for printing in all enlargers The development times are intended as a guide and may be altered if a different result is needed. For manual processing in spiral tanks and deep tanks, the development times are based on intermittent agitation.
PAGE 4
DELTA 100 PROFESSIONAL Technical Information PROCESSING Development Times If Delta 100 Professional has been inadvertently exposed at settings below EI 50/18 or above EI 200/24, the following guide will ensure usable negatives are obtained. Obviously, the quality of negatives processed in this way will not be so high as conventionally processed ones.
PAGE 5
DELTA 100 PROFESSIONAL Technical Information PROCESSING DELTA 100 Professional can be processed in all types of processing equipment including spiral tanks, rotary processors, dishes/trays, deep tanks and automatic processors. Standard capacity figures and replenishment rates can be maintained. When fixing DELTA 100 Professional however, slightly longer times than used with conventional film are recommended for best results. Safelight recommendations Handle Delta 100 Professional film in total darkness.
PAGE 6
DELTA 100 PROFESSIONAL Technical Information Rinse For a final rinse use ILFORD ILFOTOL wetting agent added to water, it helps the film to dry rapidly and evenly. Start by using 5ml per litre of rinse water (1+200), however the amount of ILFOTOL used may need some adjustment depending on the local water quality and drying method. Too little or too much wetting agent can lead to uneven drying. Remove excess rinse solution from the film before drying.