Processor Troubleshooting

When troubleshooting out of tolerance processor conditions, use Speed Index as the primary guide. Speed Index is the most predictable indicator for all film types. Base+Fog is predictable, but is the least sensitive. Contrast Index reacts predictably for a given set of film conditions but may vary from film to film.

Listed below is a chart showing Speed Index and Base+Fog reactions to common processor problem conditions.

As Control Records become more complete for a given film, the relationships between Contrast Index and Processor Conditions will become apparent. Always note the reason for out-of-tolerance processor condition on the Control Record.

NOTE: When out-of-tolerance conditions are noticed, always verify results with another test film before making any processor adjustments.

Speed Index	Base+Fog	Possible Cause

High	High or	Developer
	Normal	temperature too high.
		Developer over
		replenished.

		Improper safe lighting.

		Improper solution mix.

Low	Low or	Developer
	Normal	temperature too low.
		Developer under
		replenished.
		Inadequate developer
		circulation.
		Improper solution mix.
		Contaminated
		developer.

Processor Troubleshooting

Speed Index

Base+Fog

Possible Cause