How to make a face mask:


A mask is indispensable for controlling the spread of COVID-19. Here we will show you how to make a cloth mask, how to put it on, and how to clean it, based on the "HK Mask" invented by Dr. K. Kwong, a Hong Kong chemist.

What is the HK Mask?

The HK Mask is a reusable cloth mask with a disposable intermediate filter layer, invented by Dr. K. Kwong in 2020, during the COVID-19 outbreak.

The design of the HK mask is based on the design of a 3-layer surgical mask, which consists of an outer and inner fabric mask with an intermediate filter layer that goes between the two fabrics.

We use tissue paper or kitchen paper for the middle layer filter, so it will always stay clean. The outer and inner layer cloth can be washed, so that the mask can be used safely.

Quote from HK Mask Official Site

How to make a HK mask

There is a 10-minute video explaining how to make an HK mask, from cutting to sewing. You can take a look at it to get a general overview, and then proceed to the step-by-step process below.

1. Materials

Materials: one outer layer of cloth, one inner layer of cloth, one piece of wire, two elastic straps, two cloth straps.

(The video shows the HK Mask Kit, but you can make one yourself without a kit)

The size of the cloth will vary depending on the pattern you use.

You will need: chalk pen, tape measure, paper cutting scissors, cloth cutting scissors, thread cutting scissors, pins, pincushion.

If you have a sewing machine at home, you will be able to work more efficiently.

2. How to choose a stencil

There are five free HK mask patterns for babies, children, teens, women, and men. (XXS, XS, S, M, and L.) Choose the pattern that fits your face.

The patterns can be downloaded from here.

3. Preparing the stencil

The stencil must be the right way up, with the center of the mask on the right side of the stencil and the sides of the mask on the left side.

A 10cm scale is shown on the right end of the stencil, so confirm that there is no mistake in the scale when you printed the stencil by measuring it with a tape measure.

The outermost solid line on the pattern shows the outer edge of the outer fabric of the mask, and the thick dotted line shows the pattern for the inner fabric of the mask (slightly smaller than the outer fabric). The thin dotted line is a sewing guide for the seams.

Any paper will work for the pattern. Print out two sheets of paper and cut along the lines of the outer and inner surfaces, preparing one sheet of paper for each layer.

4. Cutting the fabric

Fold both the outer and inner fabrics in half so that the inside of the fabric is facing outward. Place the stencils on the fabric and fasten with pins. For the outer layer, cut around the outside of the pattern, and then make a notch in the area marked "notch hole". For the lining, cut around the thick dotted line and the cutting process is complete.

5. Sewing (1) The center of the mask of the outer cloth and the inner cloth

Sew the left and right halves of each layer together. First, with the fabric lining facing outward so the seam is on the inside of the mask, sew down the center of the mask, 1cm from the edge. When you're done sewing, reverse the fabric.

*Image: Wrong Side refers to the reverse, inner side of the fabric.

6. Sewing (2) Upper part of outer layer cloth

Next, fold a 1cm hem along the top edge of the outer fabric, with the lining of the fabric facing up. Sew as far as the first notch hole so as to secure the fold. Next, insert the wire into the notch hole and sew the rest of the fold.

7. Sewing (3) Lower part of outer layer cloth

Similarly, with the fabric lining facing up, fold a hem in the bottom edge of the fabric about 1 cm wide. Sew to the edge so that this fold is fixed, and the outer layer cloth sewing is complete.

8. Sewing (4) Top and bottom of the inner fabric

Next, the inner fabric is sewn. Fold a 1cm hem in the top and bottom of the fabric, with the lining of the fabric facing up. Sew all the way to the edges to secure the hem.

9. Sewing (5) Attaching elastic to the outer fabric

Attach elastic to the outer surface of the outer fabric. Mark the position for the elastic at the ELASTIC PLACEMENT position shown on the pattern. Sew about 1 cm from the edge of the fabric.

*Image: Right Side refers to the outer surface of the cloth.

10. Sewing (6) Sew the outer fabric and the inner fabric

Place the outer and inner linings together so that they both face inwards, and sew the left and right sides together about 1 cm from the edge. Sew the elastic in place as above. Cut off the excess cloth at each end (about 0.5 cm). Then turn the mask the right way out.

11. Sewing (7) Thread the string through both ends

Thread a string between the outer and inner fabric and secure it to the ends. Sew the two pieces of cloth together about 1 cm from the edge, so as not to sew the string.

12. Sewing (8) Finishing

Sew a small rectangle at the bottom of the mask, about 1 cm wide, so that the filter does not fall out from under the mask. Sew through both pieces of cloth. Next, sew both sides of the wire so that the wire at the top of the outer layer cloth does not slip out. Finally, tie a knot in both ends of the string, and the HK mask is complete.

How to wear the mask

Prepare HK mask, alcohol disinfectant and a middle layer filter (tissue paper or kitchen paper). First, apply alcohol rubbing solution to your hands evenly. Next, place your filter paper between the two cloths of the mask. Then, put the elastic of the mask over your ears, and finally, tie the string around your neck and the back of your head to prevent the mask from falling off.

Please note that the installation manual is available in multiple languages.

Installation manual (multiple languages)

How to clean and maintain the mask

HK masks should be washed with soap and water, without chemicals, after removing the paper filter. Rinse thoroughly with water and allow to dry. After it has dried, the mask can be ironed and the cleaning is complete.

As is the case with surgical masks, it is recommended that the HK mask should be replaced every 4 hours, either by replacing the inner filter or by changing the whole HK mask.

Dr, K. Kwong

BSc (Hons), PhD (Chemistry) The University of Hong Kong

D., Department of Chemistry, Faculty of Science, The University of Hong Kong. A former lecturer at The Chinese University of Hong Kong, he is now also an authority on chemistry examinations. Also known as the Godfather of Chemistry, he has been producing high-achieving students over the years and breaking records for the number of students he has enrolled. He is the author of several best-selling chemistry textbooks, including "Longman, The Mastermind Series" and "Effective Chemistry" and "Quick Revision Chemistry.

Source :