All factors affecting the accurate repetition of a radio-graphic technique for the examination of a succession of similar material samples, components or structures are considered.
A recommended standard format for all techniques is given.
For the various broad fields of radiography, viz. castings, welds, structures and other applications, specific require-ments are laid down as appropriate to each case.
Finally, consideration is given to the environmental and physiological conditions affecting the efficiency of film interpretation by operators, and certain minimum con-ditions recommended.