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15
6. Release the expose button and remove the film
immediately.
7. Develop the film in the processor to be monitored
(refer to Section 2).
8. Record data on film immediately after
development (refer to Section 2).
IMPORTANT NOTES:
• Film must be inserted all the way to the back of
the unit in order to be exposed properly.
• The sensitometer is calibrated to expose screen-
type films normally used for general radiography
to an approximate density of 1.OD+ Base+Fog on
Step No. 11.
• If the X-Rite 390/391 Densitometer is used to
measure film strips, the sensitometric exposure
must meet the following criteria:
- The exposure must have a gamma of .7 or greater
on steps 7 through 15. (increasing density
increments of at least .11D).
- The film must have at least 1.25 inch of clear
leader at both ends of the exposure. The use of 8" x
10" or 18cm x 24cm film is recommended.