efs = effective film speed
Photo Impact is proud to use Kodak's XTOL Developer as the standard black & white film developer.
We also offer hand line processing in the developer of your choice.
"How should I rate my Black & White film?" many people often ask us.
When you purchase black & white film, you take into consideration many factors before you decide on a specific emulsion. Lighting, grain, film speed, development chemistry, and the subject matter. Each of these variables, when altered, can have a specific outcome. Photo Impact is most often asked, "How should I rate my black & white film?" Adjusting the way you rate your film based on the way it reacts in a specific developer is called the Effective Film Speed. Below are the adjusted film speeds Photo Impact recommends for Kodak's XTOL developer. These adjusted ISO speeds (or Effective Film Speeds ) are based on the sensitometric testing of each type of film and will give you optimum results for deep shadow separation and high-light control. Try the below listed EFS for your type of film and develop "normal."
XTOL has been put to the test and we're excited to offer our customers this state-of-the-art chemistry.
You'll see improved results in the following areas:
Better Film Speed
In XTOL, most films yield about 1/3 stop more film speed than other developers.
Enhanced Sharpness
XTOL's dynamic new formula improves film resolution.
Finer Grain
For a "cleaner look" than most conventional film developers.
Enhanced Contrast
Better separation in the low values (shadow detail).
Improved Highlight Detail
Helps control highlights from "blocking up."
Better Film Latitude
More pushes and pulls will accommodate a wider range of shooting styles.
With XTOL, shoot your favorite black & white film, and notice the improvement at Photo Impact.
