INTRODUCTION
Color prints can be made directly from color transparencies without the time
and expense of making an internegative. In this lesson, you will learn the
proper techniques for making prints from slides using both the conventional
color coupler reversal method and the silver-dye bleach process.
PART A - MAKING THE STANDARD TRANSPARENCY AND COLOR REVERSAL
PRINTING
1.
Standard Transparencies.
In reality, there is no such thing as an "absolute standard transparency."
There can only be, by definition, "relative standard transparencies." You
must decide, within certain guidelines, essentially what a useful standard
transparency is for your reproduction system.
For your guidance, the
following general definition may be useful.
A relative standard color transparency is one that is subjectively
representative of the user's normal input and that has been exposed using
the correct lighting conditions. It requires spectral quality specified by
the film manufacturer and required by the user. The transparency must have
been processed strictly according to the manufacturer's recommendations and
stored and protected consistent with good practice and recommended
conditions.
2.
Two Methods of Making Color Prints Directly from Transparencies.
a. Coupler Development (Reversal Papers) Process.
In printing color
reversal papers the system produces positive color images.
(1) The exposed reversal color paper is developed in a special black
and white developer which produces a negative silver image in each of the
three emulsion layers.
(2) The paper is then re-exposed to a bright light in order to fog
the remaining silver halides and render them developable, or the paper is
chemically "fogged" in the color developer.
If after processing the film
overall looks light, the film may have been fogged by light prior to
processing.
(3) The latent positive image is then dye coupler-developed to form
three positive dye images: yellow, magenta, and cyan.
5-2
SS0514
Previous Page
