Abstract: The cell depth of a printing or similar ink applicator roller or the like is determined by cleaning a small area of the roll surface, hinging to the surface proximate the cleaned area by means of a pressure sensitive adhesive tape a rectangular polyester film mount with a coated matte underface, to which the resin used will permanently adhere when cured, applying a small amount of a liquid photo-polymer resin to a section of the cleaned area, folding the mount over the areas, squeegeeing the tape outerface with a straight-edge spatula to fill the cells with the resin to the level of the roll surface then securing the outer border of the mount to the roll surface by a pressure-sensitive tape exposing the resin to ultra-violet radiation to cure the resin to a solid somewhat flexible rigid state adherent to the mount, removing the mount and measuring the thicknesses of the uncoated and coated areas of the mount and calculating their difference as an indication of the cell condition and/or depth of the roll surfa