A professional who collects, inspects, and tests glassware, such as containers and cathode-ray tubes, for conformance to specifications. Respnsibilities include:

• Collects samples to be tested and measured, and marks samples and logs with identifying information, such as batch number, machine number, and mold number.
• Visually inspects glassware for defects, such as striations (stress lines), bubbles, pits, discolorations, incomplete grinding and polishing, and painting flaws, such as chips and smears.
• Fills containers with water to determine fluid capacity by weighing filled container on scales or pouring contents into graduated cylinder.
• Verifies size, shape, radius, thickness, weight, eccentricity, and surface flatness, using templates, calipers, micrometers, scales, eccentricity table, surface blocks, wedge blocks, or electronic measuring instruments.
• Determines annealed quality of glassware by either observing glass through polariscope, measuring wave length of glass color with spectrophotometer, or by examining microsections for annealing striations.
• Immerses containers in hot or cold water tanks to estimate thermal shock resistance.
• Determines bursting point of container by either filling container with water and inserting electrically controlled plunger in container to apply pressure, or placing container in pressurized chamber.
• Cuts glass into wafers and examines glass under microscope to measure micro defects.
• Records results of tests and deviations from standards and submits to supervisor; notifies supervisor of serious defects, such as failure to withstand thermal shock or defective mold.
• May set and adjust measuring devices used in laboratory or by selector.
• May compile specifications from new product orders for setting quality control standards.
• May place sample in test tube, immerse test tube in controlled temperature water, and observe settling point of glass to estimate density of glass.
• May place container in surface abrader to estimate container scratch resistance.
• May place container in jaws of calibrated vice to determine horizontal bursting point.
• May test gob (lump) of molten glass from furnace and forehearth to ensure glass temperatures are within specifications.
• May pack sample ware for shipment to customer.
• May perform dimensional measurements at production work stations and be designated Floor Inspector.
• May be designated according to article inspected as Bottle Inspector; Television-Tube Inspector.