#declare Acetone_Ior = 1.36;
#declare EthylAlcohol_Ior = 1.36;
#declare SugarSolution30pc_Ior = 1.38;
#declare Glycerine_Ior = 1.473;
#declare SugarSolution80pc_Ior = 1.49;
#declare SodiumChloride_Ior = 1.54;
#declare Polystyrene_Ior = 1.57;
#declare CarbonDisulfide_Ior = 1.63;
#declare MethyleneIodide_Ior = 1.74;
#declare ArsenicTrisulfideGlass_Ior = 2.04;