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Thursday, Oct 02, 2025

How to make your own mask: Hong Kong scientists reveal temporary solution for those unable to get protective gear because of panic buying and price-gouging

Thousands have queued overnight outside pharmacies and prices have spiked because of dwindling supplies. Lab tests by City University find home-made masks achieve 80 to 90 per cent function of regular ones in terms of filtration of aerosol and droplets

Scientists in Hong Kong have invented a cheap and easy way to make home-made masks as the city, gripped by fear over the deadly coronavirus, suffers from long queues and price-gouging over its dwindling supplies of protective gear.

The University of Hong Kong-Shenzhen Hospital worked with the Science Park to devise the do-it-yourself method as thousands of people have waited overnight outside pharmacies promising new stock and costs spiking to as much as HK$400 or more for a box of 50 surgical masks. Often missing from the queues are many elderly – too weak or poor to join – some of whom have resorted to steaming the few masks they have left or and reusing one for days.

“I hope this can alleviate the public panic. Scientific tests found these home-made masks can offer a certain extent of protection if one doesn’t have a mask at home,” executive councillor and Elderly Commission chairman Dr Lam Ching-choi said.

“It’s not good for elderly to take such risks as queuing for a mask in the early morning.”

Lam said he was in touch with some schools to explore whether students studying at home could help produce more masks, adding that Professor Yuen Kwok-yung, the city’s top microbiologist tackling the coronavirus, had also endorsed the use of such masks.m

Releasing the procedure on Friday, the hospital said it hoped the home-made gear could serve as a temporary measure for those without surgical masks, easing the pressure on the city’s remaining stock.

Joe Fan King-man, the institution’s assistant hospital chief executive, said the home-made masks had undergone laboratory tests by City University and were proven to have achieved 80 to 90 per cent of the function of regular surgical masks in terms of their filtration of aerosol and droplets.


However, Fan said they did not serve as a permanent substitute for surgical masks.

“The home-made masks can only act as an alternative for those who don’t have any gear but need to protect themselves from infection. They can never be a substitute or replacement for surgical masks,” he said.

The Consumer Council is a partner of the project.


How to make your own masks and protective shield at home:

Required items: kitchen roll, strong tissue paper, elastic bands, a hole punch, paper tape, scissors, plastic-coated steel wire, a pair of glasses, plastic file folders and binder clips.


Preparation:

For the mask:

Wash your hands thoroughly with soap and clean your items

Put one piece of kitchen roll, with proper hygiene certification, on top of another

Place a piece of tissue paper, which will act as the bottom layer of the mask, on top of the two pieces of kitchen roll
Cut the stack of paper into two

Use the paper tape to seal off the two sides of the mask

Make two holes at each sealed side with the punch

Attach the metallic wire with paper tape to the top edge of the mask to make the nose bridge wire

Tie four rubber bands through the holes on the mask’s sides


For the protective shield:

Cut the file folder into two pieces

Attach one piece on the edge of the glasses with binder clips

The shield can be reused after disinfection for each usage

Note: The hospital said other materials such as cling film, air conditioner filter paper, and cotton cloth were not suitable for making the masks.

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