Russian, Cyrillic Keyboard Overlays Stickers, Labels. White Characters, Reverse Print, Transparent for Dark Color Keyboards Russian White Overlays (white ink on clear overlay for black keyboards) Graphic is for Sample only.. White characters. REVERSE PRINT, for Long Lasting Use. Overlays are manufactured of durable Lexan.They won't tear, crack, discolor, or slip off even after years of use. The Overlay adhesive firmly attaches the overlay in place without damaging the keyboard key or the original key legend. If desired, Overlays may be removed without causing damage to the original key or the legend on the key. All printing is on the reverse side of the overlay (i.e., underneath) so that the printing will not rub or scratch off in normal use.