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, which remains effective after multiple washes, offers significant protection against harmful UVB rays. The treatment process involves dipping fabric in a solution, drying, and curing. The cost is minimal, and the treatment does not affect fabric quality. 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 loses effectiveness after washing.

• It remains effective even after repeated washings.

• It is very expensive to produce.

How much more effective is the UV absorber compared to untreated clothing?

• Ten times more effective

• Five times more effective

• Twenty times more effective

• Fifty times more effective

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

• 1 Hong Kong dollar

• 5 Hong Kong dollars

• 20 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 makes the fabric less durable.

• It does not change the fabric's properties.

• It alters the fabric's design.