Revolutionizing Sun Protection: Nanotechnology in Fabric Development

The video discusses the risks of sun exposure, such as sunburn and skin cancer, and introduces a UV absorber developed by the Nanotechnology Center at Hong Kong Polytechnic University. This absorber, applied to fabrics, offers significant protection against UVB rays, maintaining effectiveness even after multiple washes. The treatment process involves dipping the fabric in a solution, drying, and curing. The cost is minimal, and the treatment does not affect fabric quality or design. However, UV absorber clothes are not yet available in the market.

What are some of the harmful effects of UVB rays mentioned in the video?

• They have no effect on humans.

• They enhance vitamin D production.

• They improve skin health.

• They cause skin cancer and cataracts.

What makes the UV absorber developed by the Nanotechnology Center unique?

• It changes the color of the fabric.

• It works even after multiple washes.

• It is more expensive than regular clothing.

• It is only available in Hong Kong.

How much more protection does the UV absorber offer compared to untreated clothing?

• Five times more

• Ten times more

• Twenty times more

• Fifty times more

What is the cost to treat an entire outfit with the UV absorber?

• 20 Hong Kong dollars

• 1 Hong Kong dollar

• 5 Hong Kong dollars

• 10 Hong Kong dollars

What is a notable feature of the UV absorber regarding the fabric's properties?

• It makes the fabric heavier.

• It does not change the fabric's design or quality.

• It makes the fabric waterproof.

• It alters the fabric's texture.