a thermoforming methodology for laminated thermoplastic sheets which preserves the class “ a ” finish and high gloss thereof . a thermoformer has a vacuum box component which includes a mold , and a pressure box component which is selectively sealable in relation to the vacuum box component . a heated laminated thermoplastic sheet is placed in the thermoformer , the class “ a ” side thereof facing away from the mold , and the thermoformer sealed . vacuum is applied to the vacuum box component and simultaneously air pressure is applied to the pressure box component , including application of chilled compressed air , resulting in forming of the sheet on the mold and controlled cooling of the sheet which preserves its class “ a ” finish and high gloss .