Chapter 7 Photographic Paper Sensitize Proper Printing Papers /Positive Paper

Question 1

Structure of Photographic Paper

Answer 1

Emulsion Layer
Baryta Layer
Base

Question 2

This refers to layer of photographic paper that contains silver halides suspended in gelatine; the layer
making the paper light sensitive; emulsion maybe composed of silver chloride, silver bromide, or silver
chlorobromide.

Answer 2

Emulsion Layer

Question 3

This refers to layer of photographic paper that is a gelatine layer containing barite crystals (barium oxide)
to increase the reflectivity of the paper; the layer that makes the film glossy.

Answer 3

Baryta Layer

Question 4

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

Answer 4

Base

Question 5

This refers to the combination of its texture and finish; texture maybe smooth fine grained, or rough and finish
maybe glossy (semi – matt) and matt.

Answer 5

Surface

Question 6

This refers to coating that is made up by using a layer of paper which is coated both sides with a synthetic
polymer, usually polyethylene; forms the base on to which the emulsion is coated.

Answer 6

Resin – coated (RC) papers

Question 7

This refers to coating that can be air – dried, needs large volumes of water for effective washing that can
be reduced with washing aid.

Answer 7

Fiber – based Papers

Question 8

Types Based on Emulsion Used

Answer 8

Silver Chloride Papers (Chloride Papers)
Silver Bromide Papers (Bromide Papers)
Silver Chlorobromide (Chlorobromide Paper)
Variable Contrast Paper (Contrast Paper)

Question 9

This refers to types based on emulsion that classified by its own maker according to their own ideas; most
of those being used confirm broadly with:

Answer 9

Variable Contrast Paper (Contrast Paper)

Question 10

This refers to types based on emulsion that the slow is used for contact and the fast is used for enlargement/projection printing; they give an image tone from warm black to reddish brown, depending on
length of exposure, type, dilution and duration of developer.

Answer 10

Silver Chlorobromide (Chlorobromide Paper)

Question 11

This refers to types based on emulsion with fast emulsion speed; for projection printing (enlarging)

Answer 11

Silver Bromide Papers (Bromide Papers)

Question 12

This refers to types based on emulsion with slow emulsion speed; for contact printing; image size is the
same as that of the negatives; they give blue black tones in a 65 – 68 degrees F to develop

Answer 12

Silver Chloride Papers (Chloride Papers)

Question 13

Grades of Printing Papers

Answer 13

1. Velox # 0 – This refers to grades of printing papers for extreme contrast negatives; the low contrast in the
   sensitized paper counteracts the high contrast in the negative, to give a new print.
2. Velox # 1 – This refers to grades of printing papers for high contrast negative.
3. Velox # 2 - This refers to grades of printing papers for printing normal contrast negatives.
4. Velox # 3
   This refers to grades of printing papers for negatives that have weak contrast.
5. Velox # 4
   This refers to grades of printing papers that provides sufficient contrast to compensate for every weak
   contrast; it is useful in printing silhouettes and other such pictures in which high contrast is desired.
6. Velox # 5
   This refers to grades of printing papers for flat negatives that are relatively unprintable.

Question 14

Paper weight are?

Answer 14

Light weight
Single weight
Double weight

Question 15

This refers to the paper weight that is intended for purpose which involve folding

Answer 15

Light weight

Question 16

This refers to the paper weight for all ordinary photographic purpose

Answer 16

Single weight

Question 17

This refers to the paper weight for large prints because they stand up better rough treatment

Answer 17

Double weight