A method, system, and computer program product for integrated circuit recovery testing using simulation checkpoints is provided. Embodiments include impinging a continuous wave CO2 laser light beam on a rotating glass-ceramic substrate to uniformly heat an annular zone at a temperature between the crystallization temperature and melting point of the glass-ceramic substrate followed by air cooling to induce a continuous surface roughness having an Ra of about 5 to about 20, thereby enabling a glide height of about 0. Advantageously, the present invention reduces the problem of concatenated overshoot by minimizing the control-loop response to events that occur at other nodes. A wiper may be attached to the housing, for wiping and cleaning a cap of the housing. A crystal blank is bonded on the base using the adhesive in order to form the crystal unit, after removing the mask from the base. An intrinsic color of a given pixel located in an area of interest that is adjacent to at least one of the first and second regions is estimated by extrapolating from colors of multiple pixels in one of the first and second regions and multiple pixels in the other of the two regions.