1.Exposing a plate to the light source of a platemaker to create the image on the plate.
2.A technique for selective lightening of an area of a print by giving it additional exposure. This is accomplished usually by blocking the projected image during exposure using the printer’s hands, creating a small opening with them to let the light fall only on the selected image area. Because the hands cast a soft-edged shadow, this limits the ability to burn in small areas accurately. Sometimes this can be worked around by cutting an appropriately shaped hole in a piece of thin cardboard to wave over the picture.