LESSON 1
b. Reversal/positive color chemicals are designed to produce only color
transparencies. The Army uses the standard Ektachrome (E6) processing kit.
Each kit consists of the following chemicals: first developer, reversal
bath, color developer, conditioner, bleach, fixer, and stabilizer.
c. Color print chemicals are the counterpart to the black and white
paper chemicals. Black and white chemicals can process almost any black and
white paper on the market. However, color print chemicals are designed to
process only one type of print paper, Ektacolor. The Ektaprint2 (EP2) kit
consists of a developer, bleachfix, and stabilizer.
d. The color chemicals are under constant revision to improve the
quality of color photography. Again, the chemical processes used are C41
for film, EP2 for paper, and E6 for transparencies. The actual mixing
procedures, mixing precautions, and processing steps will be discussed in
the subcourse on color photography.
5. Mixing chemicals. Regardless of the type of chemical, black and white
or color, you must follow the manufacturer's mixing instructions. Black and
white chemicals usually have their mixing instructions on the back of the
package or bottle (fig 12); color chemicals have a mixing instruction sheet
packed with them (fig 13). These instructions will tell you how to mix the
chemicals, at what water temperature, how much water to use, how much to add
to obtain a working solution and mixing precautions.
Figure 12. Black and white mixing instructions
4
Previous Page
