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PANCHROMATIC EMULSION [4 records]

Record 1 2003-11-19

English

Subject field(s)
  • Photography
  • Reprography
DEF

A photographic material that is sensitive to ultraviolet light and to all the colors in the visible spectrum. It reproduces all colors in their approximate tone values in shades of gray.

OBS

the various print systems now available are : the making of three black-and-white negatives on panchromatic emulsion exposed directly to the subject

French

Domaine(s)
  • Photographie
  • Reprographie
DEF

Émulsion panchromatique est une émulsion dont la sensibilité chromatique s'étend à toutes les radiations colorées.

Spanish

Campo(s) temático(s)
  • Fotografía
  • Reprografía
DEF

Emulsión fotográfica cuya sensibilidad espectral se extiende desde el azul hasta el infrarrojo cercano.

Save record 1

Record 2 1999-09-15

English

Subject field(s)
  • Photography
DEF

Obsolete additive colour process employing an irregular mosaic filter screen of microscopic red, green and blue dyed starch grains over-coated with a panchromatic emulsion.

OBS

Exposed through the screen the emulsion was reversal processed and the positive image viewed through the same screen (Auguste and Louis Lumière 1903). Marketed 1907 on glass, 1933 on sheet film base.

French

Domaine(s)
  • Photographie
CONT

La reproduction des couleurs du procédé autochrome se fait par réseau trichrome d'après le principe additif. Le réseau trichrome est constitué de fécule de pomme de terre tamisée, teintée en bleu, en vert et en rouge. Après les avoir mélangées, elles sont collées sur une plaque de verre. Les interstices entre les grains sont noircis avec de la poudre noire de charbon de bois. On recouvre la surface ainsi obtenue d'une couche de vernis très mince et imperméable, puis on coule sur ce vernis une couche d'émulsion photographique panchromatique. Ce procédé correspond à celui de la synthèse additive : 3 projecteurs équipés de filtres bleu, vert et rouge, reproduisant les différentes couleurs par addition, et les 3 plaques argentique en noir et blanc.

Spanish

Save record 2

Record 3 1999-02-08

English

Subject field(s)
  • Cinematography
  • Audiovisual Techniques and Equipment
  • Photography
DEF

A photographic film composed of two sensitive emulsions, each is sensitive to a different color when exposed simultaneously.

CONT

Bipack films were employed in early colour processes to obtain a chromatic selection of the scene being taken. This was achieved by placing one film with orthochromatic emulsion face to face with another coated with panchromatic emulsion. The first film was tinted to act as a selecting filter so that a different region of the spectrum was recorded on each emulsion. Nowadays, the standardization of colour monopack film has made the bipack system obsolete...

French

Domaine(s)
  • Cinématographie
  • Audiovisuel (techniques et équipement)
  • Photographie

Spanish

Save record 3

Record 4 1994-05-11

English

Subject field(s)
  • Photoengraving
  • Photography
DEF

An irregular mosaic filter screen of microscopic red, green and blue dyed starch grains over-coated with a panchromatic emulsion.

French

Domaine(s)
  • Photogravure
  • Photographie
DEF

Plaque dont le support de verre est revêtu d'un réseau trichrome formé d'éléments microscopiques (grains de fécule de pomme de terre colorés en magenta, vert et orangé) et d'une émulsion panchromatique.

Spanish

Save record 4

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