Faults occur during exposure and are the responsibility of the operator taking the view. Any part of the film exposed to X-rays or daylight is turned black and opaque by the developer solution. The remainf unexposed part is still sensitive to light and appears green and opaque. Fixer disolves away the unexposed part is still sensitive to light and appears green and opaque.
Fixer disoves away the unexposed green part, leaving it completely transparent and no longer sensitive to light. Some common faults that occur during exposure are outlined in the following table .
ELONGATION OF THE IMAGE- collimator angulation is too shallow, producing a long image
FORESHORTENING OF IMAGE- collimatior angulation is too steep, producing…