The documentation of a crime scene may be easily identified by providing an identifier frame with the necessary case information. Each card has an 18% Gray face for case information and calibration. It has a 90% reflective White back for white balance and/or photo log. The case edges provide standard and metric measuring scales, Gray scale and registration marks. The cards are offered in pads of 25 in two sizes, 8.5 x 11 inches and 4 x 5.375 inches.