Paper Industry br The Sheet material made up to a network of natural cellulose fibers which have been deposited from aqueous suspension is called Paper . br Raw Material br Pulping Method br Kraft process ( alkaline) br Sulphite Process ( acidic ) br Neutral Sulphite semi chemical process br Steps Involving in the Neutral Sulphite semi chemical process br 1. Cutting of Raw material br 2. Dry Cleaning br 3. Wet Cleaning br 4. Screening br 5. Digestion br 6. Blow Tank br 7.