chemically degreasing the surface of a parent substrate which is substantially optically transparent to light in the visible region of 350 to approximately 750 nanometers and which comprises a material selected from {HEAD ~ the group} consisting of an amorphous material, a single crystal, polycrystalline materials, glass, salt materials, ceramic materials and {TAIL ~ mixtures} thereof to remove hydrocarbon contamination 
chemically degreasing the surface of a parent substrate which is substantially optically transparent to light in the visible region of 350 to approximately 750 nanometers and which comprises a material selected from { HEAD ~ the group } consisting of an amorphous material , a single crystal , polycrystalline materials , glass , salt materials , ceramic materials and { TAIL ~ mixtures } thereof to remove hydrocarbon contamination
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