The radiographic image of apparent discontinuities in the imaging screens can be separated from actual discontinuities in a part being radiographed by:

comparing a neutron radiograph of the parts to a blank neutron radiograph of the same imaging screen with no parts in place.

producing a photographic copy of the original neutron radiograph using X-ray duplicating film.

increasing the exposure time of the radiograph.

decreasing the temperature of the developer solution. 69