X-ray film should always be handled carefully to avoid physical strains, such as
pressure, creasing, buckling, friction, etc. Whenever films are loaded in semi-flexible
holders and external clamping devices are used, care should be taken to be sure
pressure is uniform. Marks resulting from contact with fingers that are moist or
contaminated with processing chemicals, as well as crimp marks, are avoided if large
films are always grasped by the edges and allowed to hang free. Use of envelopepacked films avoids many of these problems until the envelope is opened for
processing.