Question:
Rosin, soap along with aluminum sulphate and wax emulsions are added for _________ the paper.
Rosin, soap along with aluminum sulphate and wax emulsions are added for _________ the paper.
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"Sizing" is the papermaking term for liquid resistance.
Alum (aluminum sulphate) is almost always paired with rosin in traditiol acid-sizing systems to fix hydrophobic molecules to cellulose.
Alum (aluminum sulphate) is almost always paired with rosin in traditiol acid-sizing systems to fix hydrophobic molecules to cellulose.
Updated On: Jul 28, 2026
- Beating
- Sizing
- Loading
- Colouring
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
During paper manufacturing, chemical additives are introduced to the pulp to impart specific properties to the fil paper sheet.
Step 2: Detailed Explation:
Paper is turally highly hydrophilic and absorbent due to its cellulosic fibers.
Unrefined paper would absorb ink instantly, leading to bleeding and smudging.
To reduce the liquid absorption rate and control ink penetration, a process called "sizing" is performed.
Sizing agents include rosin, soap, wax emulsions, and aluminum sulphate (commonly called papermaker's alum).
Rosin acts as a hydrophobic barrier, while aluminum sulphate acts as a mordant to fix the rosin particles onto the cellulose fiber surfaces.
This chemical treatment reduces the paper's surface energy, preventing capillary absorption of aqueous liquids.
Beating refers to physical fiber mechanical treatment, loading involves adding mineral fillers for opacity, and colouring adds dye pigments.
Step 3: Fil Answer
Thus, rosin, soap, alum, and wax emulsions are sizing agents added during the sizing stage of papermaking.
During paper manufacturing, chemical additives are introduced to the pulp to impart specific properties to the fil paper sheet.
Step 2: Detailed Explation:
Paper is turally highly hydrophilic and absorbent due to its cellulosic fibers.
Unrefined paper would absorb ink instantly, leading to bleeding and smudging.
To reduce the liquid absorption rate and control ink penetration, a process called "sizing" is performed.
Sizing agents include rosin, soap, wax emulsions, and aluminum sulphate (commonly called papermaker's alum).
Rosin acts as a hydrophobic barrier, while aluminum sulphate acts as a mordant to fix the rosin particles onto the cellulose fiber surfaces.
This chemical treatment reduces the paper's surface energy, preventing capillary absorption of aqueous liquids.
Beating refers to physical fiber mechanical treatment, loading involves adding mineral fillers for opacity, and colouring adds dye pigments.
Step 3: Fil Answer
Thus, rosin, soap, alum, and wax emulsions are sizing agents added during the sizing stage of papermaking.
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