CHAPTER 7 Flashcards
Structure of Photographic Paper:
- Emulsion Layer
- Baryta Layer
- Base
This refers to layer of photographic paper that CONTAINS SILVER HALIDES suspended in gelatine
Emulsion Layer
This refers to layer of photographic paper that is a gelatine layer containing BARITE CRYSTALS to increase the reflectivity of the paper
Baryta Layer
the layer that makes the FILM GLOSSY
Baryta Layer
barite crystals ALSO KNOWN
barium oxide
This refers to layer of photographic paper that is MADE OF HARD PAPER which must be chemically pure; chemical content does not change or react with light or other chemicals during printing.
Base
It is the FOUNDATION OF THE PHOTOGRAPHIC PAPER
Base
This refers to the combination of its TEXTURE AND FINISH
Surface
It maybe SMOOTH FINE grained, or rough
TEXTURE
IT maybe GLOSSY (semi – matt) and MATT
FINISH
Coating:
- Resin – coated (RC) papers
- Fiber – based Papers
This refers to coating that is made up by using a layer
of paper which is COATED BOTH SIDE WITH A SYNTHETIC POLYMER, usually polyethylene; forms the base on to which the emulsion is coated.
Resin – coated papers
This refers to COATING THAT CAN BE AIR DRIED, needs large
volumes of water for effective washing that can be reduced with washing aid
Fiber – based Papers
Types Based on Emulsion Used:
- Silver Chloride Papers
- Silver Bromide Papers
- Silver Chlorobromide
This refers to types based on EMULSION WITH SLOW EMULSION SPEDD
Silver Chloride Papers
IMAGE SIZE IS THE SAME as that
of the negatives;
Contact printing
This refers to types based on EMUSTION WITH FAST EMULSION SPEED
Silver Bromide Papers
they give BLACK TONES IN METAL hydroquinone developers and take about 1 ½ minutes to develop at 18 – 20 degrees C
Silver Bromide Papers
they give BLUE BLACK TONES in a 65 – 68 degrees F to develop
Silver Chloride Papers
give NEUTRAL TO COLD BLACK TONE which is only affected by development type and techniques.
Silver Bromide Papers
they give an image tone from WARM BLACK TO REDDISH BROWN, depending on length of exposure, type, dilution and duration of developer.
Silver Chlorobromide
This refers to types based on EMULSION THAT THE SLOW USE FOR CONTACT and the fast is used for enlargement/projection printing
Silver Chlorobromide
Grades of Printing Papers:
- Velox # 0
- Velox # 1
- Velox # 2
- Velox # 3
- Velox # 4
- Velox # 5
This refers to grades of printing papers for EXTREME CONTRAST NEGATIVE; the low contrast in the sensitized paper counteracts the high contrast in the negative, to give
a new print.
Velox # 0
This refers to grades of printing papers for HIGH CONTRAST NEGATIVE
Velox # 1
This refers to grades of printing papers for printing NORMAL CONTRAST negatives.
Velox # 2
This refers to grades of printing papers for negatives that HAVE WEAK CONTRAST
Velox # 3
This refers to grades of printing papers that provides SUFFICIENT CONTRAST to compensate for every weak contrast;
Velox # 4
This refers to grades of printing papers for FLAT NEGATIVES that are relatively unprintable.
Velox # 5
Paper Weight:
- Light Weight
- Single Weight
- Double Weight
This refers to paper weight that is intended for
PURPOSES WHICH INVOLVE FOLDING
Light Weight
This refers to paper WEIGHT FOR LARGE PRINTS because
they stand up better rough treatment
Double Weight
This refers to paper weight for ALL ORDINARY PHOTOGRAPHIC PURPOSES
Single Weight
