A professional who inspects tinplate for defects and for conformance to specified weight, size, and gauge, and classifies material according to quality. Responsibilities include:

• Examines sheets for defects, such as insufficient coating, holes, dirt, bows, or twists.
• Wipes grease from sheets with cloth and straightens bent corners with handtool.
• Measures gauge of sheets, using micrometers, and compares measurements with customer specifications.
• Weighs sheets on scale.
• Sorts sheets according to defects found and places sheets in piles.
• Marks identifying information on piles with eraser.