Which method is not effective for water-repellant paper by pulping?

Which method is not effective for water-repellant paper by pulping?

• A. Pulping
• B. Disintegration
• C. Shredding
• D. Burning

Answer: (A)

Water-repellent paper resists soaking, so moisture can’t penetrate to loosen and separate the fibers. Pulping relies on water to soften adhesives and detach fibers, usually in a slurry that allows the paper to be turned into pulp. When the coating blocks water, the fibers don’t detach properly, yielding poor pulp and making pulping ineffective for this type of paper. The other methods don’t depend on forming a pulp: disintegration and shredding mechanically reduce the paper, and burning is a disposal route that skips pulping entirely. So the method that uses water-based separation is the one that doesn’t work well with water-repellent paper.

Water-repellent paper resists soaking, so moisture can’t penetrate to loosen and separate the fibers. Pulping relies on water to soften adhesives and detach fibers, usually in a slurry that allows the paper to be turned into pulp. When the coating blocks water, the fibers don’t detach properly, yielding poor pulp and making pulping ineffective for this type of paper. The other methods don’t depend on forming a pulp: disintegration and shredding mechanically reduce the paper, and burning is a disposal route that skips pulping entirely. So the method that uses water-based separation is the one that doesn’t work well with water-repellent paper.