What Happens to My Wool Sweater in the Washer?

The video explains why wool sweaters shrink or get damaged in washing machines. It highlights the biochemistry of wool, which is made of protein, and how modern detergents contain enzymes that break down proteins, leading to damage. The structure of wool, with its cuticles, also contributes to shrinkage when agitated in water. To prevent damage, it's advised to wash wool in cold water with suitable detergents or opt for dry cleaning.

What is the primary reason wool sweaters should not be washed in a machine?

• They are made of protein fibers.

• They are too expensive.

• They are too delicate.

• They are made of synthetic fibers.

What type of enzyme in laundry detergents can damage wool fibers?

• Proteases

• Cellulases

• Lipases

• Amylases

Why do proteases in detergents cause holes in wool garments?

• They break down starch.

• They break down cellulose.

• They break down fats.

• They break down proteins.

What structural feature of wool fibers causes them to shrink when agitated in water?

• Synthetic coating

• Smooth surface

• Elastic fibers

• Cuticles

What is a recommended method for washing wool garments?

• Use bleach for better cleaning.

• Use a high-speed washing machine cycle.

• Use cold water and a wool-safe detergent.

• Use hot water and regular detergent.