A hydrometallurgical process utilizing an atmospheric calcium chloride leach to selectively recover from various metal feed stocks zinc, lead, cadmium, silver, copper and other valuable metals to the exclusion of iron, magnesium, halogen salts and other unwanted elements. The invention provides an epitaxial wafer that enables mass production of a high-output andor high-efficiency LED having an emission wavelength of not less than 655 nm. The ingate rib has a trimmed edge that extends outwardly of the body no further than that of the retention nubs located adjacent the ingate rib. The amine compounds are removed by mixing a portion of the process stream a slipstream to form an aqueous stream having a water concentration of greater than 50 wt. The computer is further programmed to write the locator byte in the JPEG file and write encoded bytes in the JPEG file.