Remove vegetable matters from felts by immersion in sulfuric acid solution.
What does a Felt Carbonizer do?
Removes vegetable matter from felt by immersion in sulfuric acid solution: 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.