A professional who removes vegetable matter from felt by immersion in sulfuric acid solution. Respnsibilities include:

• Mixes specified amount of sulfuric acid and warm water in carbonizing vat, and immerses felt in vat, using chain hoist.
• Soaks felt for period of time dependent on thickness of material.
• Periodically tests solution strength, using hydrometer.
• Adds acid as required.
• Removes and suspends felt over vat to drain.