Abstract: A user assembleable identification device employable as a dog tag or other user-worn identifier configured for wearing around the neck on a chain or similar restraint. The device is provided in a kit of components assembleable to a readable tag which all come engaged to a chain or similar restraint to prevent component loss during transport. The assembled dog tag is formed of a malleable frame having a window therein surrounded by a slot. A cover sheet provides a templet for the user to cut a user formed display sheet to size. The display sheet bears user imparted identification indicia and is sandwiched between two protective cover sheets and engaged in the slot. Instructions are placed on the cover sheet for the user to assemble the device.

Abstract: Tone reproduction curves for calibrating a marking system are obtained using a test pattern with a plurality of patches, preferably a plurality of first test patches extending in a first direction and at least one second test patch extending in a second direction crossing the first direction. Reflectance values are obtained from the first and second test patches. A set of gray balanced tone reproduction curves are obtained based on the reflectance values of the first test patches, and a set of spatial gray balanced tone reproduction curves are obtained based on the reflectance values of the second test patches.