Wear a Mask to Protect Yourself and Others Masking is a critical public health tool and it is important to remember that any mask is better than no mask. Wear the most protective mask you can that fits well and that you will wear consistently. Wearing a high-quality mask along with vaccination, self-testing, and physical distancing, helps protect you and others by reducing the chance of spreading COVID-19. What kind of masks are we using?

1. z
Health risk of common
people due to using locally
manufactured face mask in
Bangladesh

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PARTICIPANTS
Name DU roll
Farhan Khan 181
Md. Anisur Rahman 182
Md Saad Bin Zamal 183
Md. Tafsirul Islam 187
Aysha Khanom 188

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Objectives of the Project
 Attempts to understanding the basics of mask technology.
 Protection from pathogen
 Models and materials of mask
 How do they perform
 Performance benchmarks
 Limitations
 performance be improvement
 Features to incorporate

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Introduction
Masks are used as
 means of source control
 minimising the excretion of respiratory droplets
 WHO’s guidance on health measures for mitigating the risk

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Types of mask

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Surgical Mask Components

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Surgical Mask Measurement

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Methodology
 Data was collected through the month of June from 1 to 30th June 2020, days
of partial lockdown to implement social distancing to avoid the spread of the
pandemic.
 The survey was carried out randomly selecting the people at different places (
Bus stops, Rail stops, Market aeas, Roads etc) in Dhaka division.
 Finally the properties of the tested face mask compared with that of the
standard face mask recommended by the Bangladesh Government as well as
WHO.

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 Air permeability
 Water Vapor Permeability
 Antimicrobial Test
 Color fastness to Perspiration of face mask fabric (Wash, perspiration, Saliva
acidic basis, rubbing

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Data Collection Process
 Google form
 E-mail, Facebook and Whatsap
 Google forms
 Authors

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Testing ptocedure

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Difference
 Google forms

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Result

15. z
Observations of anti-microbial properties of various types face mask

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Designed for one-way protection, to capture bodily fluid which leaving the wearer but it's not designed to protect the wearer
so, it's more effective than cloth face mask but less effective than N95 Respirator

18. z
Knit Mask

20. z
Test Name - Colour fastness to Saliva
ISO Method – DIN 53160-1 (2010)
Testing place – NITER Quality Control Lab
Color fastness to saliva (Acidic)
Sample type
Color
change (1-
5)
Color staining (1-5)
Acetate
Cotto
n
Nylon
Polyeste
r
Acrylic Wool
Knit Fabric
mask
3 3/4 3 3/4 3/4 3 3/4

21. z
Test Name - Colour fastness to perspiration
ISO Method – ISO 105-E04 (2013)
Testing place – NITER Quality Control Lab
Color fastness to perspiration of locally produced face mask fabric
(Acidic)
Sample type
Color change
(1-5)
Color staining (1-5)
Acetate Cotton Nylon Polyester Acrylic Wool
Knit Fabric
mask
3 2 2 3/4 3/4 3 3/4
Color fastness to perspiration of locally produced face mask fabric
(Basic)
Sample type
Color change
(1-5)
Color staining (1-5)
Acetate Cotton Nylon Polyester Acrylic Wool
Knit Fabric
mask
3/4 2 1 3/4 1/2 3/4 2

22. z
Test Name - Colour fastness to rubbing
ISO Method – ISO 105 * 12 (2016)
Testing place – NITER Quality Control Lab
Color fastness to Rubbing of face mask fabrics (Dry condition)
Sample type
Color
change (1-5)
Color staining (1-5)
Acetate Cotton Nylon Polyester Acrylic Wool
Knit Fabric
mask
1 3/4 4 3/4 3/4 4 3/4
Color fastness to Rubbing (wet condition)
Sample type
Color change
(1-5)
Color staining (1-5)
Acetate Cotton Nylon Polyester Acrylic Wool
Knit Fabric
mask
2/3 2/3 2 2/3 2/3 3 2/3

23. z
Test Name - Colour fastness to Wash
ISO Method – ISO 105-C06 (2010)
Testing place – NITER Quality Control Lab
Color fastness to wash rating
Sample type
Color
change (1-
5)
Color staining (1-5)
Acetate
Cotto
n
Nylon
Polyeste
r
Acrylic Wool
Knit Fabric
mask
3/4 1/2 2 1/2 4/5 1/2 2

24. z
Test name - Anti- bacterial test
Testing place - Bangladesh Atomic Research Institute
No. Of
Observatio
n
Types of
sample
Organisms used Results
1 Fabric MASK
Bacillus subtilis
Staphylococcus
aureus
E Coli.
Salmonella enteridis
No zone of inhibition observed
No zone of inhibition observed
No zone of inhibition observed
No zone of inhibition observed
Remarks: There is no antimicrobial activity in these provided samples

25. z
Woven Mask
 It's a type of mask made of common textiles usually by cotton,polyester (outer part)
 A cloth face mask made out of 2-ply construction with layers of 85% polyester and 15%
cotton fabric.
 At present PM 2.5 Activated Carbon filter is used which traps particulate via the process of
absorption and serves as an anti-bacterial filter .

26. z
Effectiveness of using woven face
masks
 Cloth face masks can be used for source control.
 There are no standards or regulation for self-made cloth face
masks.
 It is washable.

27. z
Test Name - Colour fastness to Saliva
ISO Method – DIN 53160-1 (2010)
Testing place – NITER Quality Control Lab
Color fastness to saliva (Acidic)
Sample type
Color
change (1-
5)
Color staining (1-5)
Acetate
Cotto
n
Nylon
Polyeste
r
Acrylic Wool
Woven fabric
mask
3/4 3/4 4/5 4/5 3/4 3/4 3/4

28. z
Test Name - Colour fastness to perspiration
ISO Method – ISO 105-E04 (2013)
Testing place – NITER Quality Control Lab
Color fastness to perspiration of locally produced face mask fabric
(Acidic)
Sample type
Color change
(1-5)
Color staining (1-5)
Acetate
Cotto
n
Nylon
Polyeste
r
Acrylic Wool
Woven fabric
mask
3/4 3 4/5 4/5 3/4 2/3 4
Color fastness to perspiration of locally produced face mask fabric
(Basic)
Sample type
Color change
(1-5)
Color staining (1-5)
Acetate
Cotto
n
Nylon
Polyeste
r
Acrylic Wool

29. z
Test Name - Colour fastness to rubbing
ISO Method – ISO 105 * 12 (2016)
Testing place – NITER Quality Control Lab
Color fastness to Rubbing of face mask fabrics (Dry condition)
Sample type
Color
change (1-5)
Color staining (1-5)
Acetate Cotton Nylon Polyester Acrylic Wool
Woven fabric
mask
1 3/4 4/5 4/5 3/4 3/4 3/4
Color fastness to Rubbing (wet condition)
Sample type
Color change
(1-5)
Color staining (1-5)
Acetate Cotton Nylon Polyester Acrylic Wool
Woven fabric
mask
2/3 2/3 2 2/3 3/4 3 3

30. z
Test Name - Colour fastness to Wash
ISO Method – ISO 105-C06 (2010)
Testing place – NITER Quality Control Lab
Color fastness to wash rating
Sample type
Color
change (1-
5)
Color staining (1-5)
Acetate
Cotto
n
Nylon
Polyeste
r
Acrylic Wool
Woven
fabric mask
3/4 3/4 4/5 4/5 3/4 2/3 1/2

31. z
Test name - Anti- bacterial test
Testing place - Bangladesh Atomic Research Institute
No. Of
Observatio
n
Types of
sample
Organisms used Results
2
Fabric Face
mask
Bacillus subtilis
Staphylococcus
aureus
E Coli.
Salmonella enteridis
No zone of inhibition observed
No zone of inhibition observed
No zone of inhibition observed
No zone of inhibition observed
Remarks: There is no antimicrobial activity in these provided samples

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How can improve the face mask
 To improve anti-microbial properties.
 To improve water vapor properties.
 To improve color fastness properties.

33. z
Kn95
#Stay_SAFE
#STAY_PROTECTED

34. z
Conditions of Bangladesh

35. The National Institute for Occupational Safety and Health (NIOSH)
Criteria of being a Respiratory Mask
• Air-Purifying Escape Respirator with CBRN Protection
• Self-Contained Escape Respirator with CBRN
Protection
• Air-Purifying Respirator with CBRN Protection
• Powered Air-Purifying Respirators with CBRN
Protection
• Self-Contained Breathing Apparatus with CBRN
Protection

36. z
Test Name - Colour fastness to Saliva
ISO Method – DIN 53160-1 (2010)
Testing place – NITER Quality Control Lab
Color fastness to saliva (Acidic)
Sample type
Color
change (1-
5)
Color staining (1-5)
Acetate
Cotto
n
Nylon
Polyeste
r
Acrylic Wool
KN95 4/5 5 5 4/5 3/4 4/5 5

37. z
Test Name - Colour fastness to perspiration
ISO Method – ISO 105-E04 (2013)
Testing place – NITER Quality Control Lab
Color fastness to perspiration of locally
produced face mask fabric (Acidic)
Sample
type
Color
change
(1-5)
Color staining (1-5)
Aceta
te
Cot
ton
Nylon
Polye
ster
Acry
lic
Wo
ol
KN95 4 5 3/4 4/5 4/5 4/5 5
Color fastness to perspiration of locally produced face mask
fabric (Basic)
Sample
type
Color
change (1-
5)
Color staining (1-5)
Acetate
Cotto
n
Nylon
Polyest
er
Acryli
c
Woo
l
KN95 4/5 5 3/4 4/5 4/5 4/5 5

38. z
Test Name - Colour fastness to rubbing
ISO Method – ISO 105 * 12 (2016)
Testing place – NITER Quality Control Lab
Color fastness to Rubbing of face mask fabrics (Dry condition)
Sample type
Color
change (1-
5)
Color staining (1-5)
Acetate
Cotto
n
Nylon
Polyeste
r
Acrylic Wool
KN95 5 5 5 5 5 5 5
Color fastness to Rubbing (wet condition)
Sample type
Color change
(1-5)
Color staining (1-5)
Acetate
Cotto
n
Nylon
Polyeste
r
Acrylic Wool
KN95 4 4 4 4 5 5 5

39. z
Test Name - Colour fastness to Wash
ISO Method – ISO 105-C06 (2010)
Testing place – NITER Quality Control Lab
Color fastness to wash rating
Sample type
Color
change (1-
5)
Color staining (1-5)
Acetate
Cotto
n
Nylon
Polyeste
r
Acrylic Wool
KN95 5 5 4/5 5 5 4/5 5

40. z
Test name - Anti- bacterial test
Testing place - Bangladesh Atomic Research Institute
No. Of
Observatio
n
Types of
sample
Organisms used Results
2 Mask -KN95
Bacillus subtilis
Staphylococcus
aureus
E Coli.
Salmonella enteridis
No zone of inhibition observed
No zone of inhibition observed
No zone of inhibition observed
No zone of inhibition observed
Remarks: There is no antimicrobial activity in these provided samples

41. z
Ways of Improvement
Filtration Process
Fabric quality
Standarization Process

43. z
Test Name - Colour fastness to Saliva
ISO Method – DIN 53160-1 (2010)
Testing place – NITER Quality Control Lab
Color fastness to saliva (Acidic)
Sample type
Color
change (1-
5)
Color staining (1-5)
Acetate
Cotto
n
Nylon
Polyeste
r
Acrylic Wool
N95 5 5 5 5 5 5 5

44. z
Test Name - Colour fastness to perspiration
ISO Method – ISO 105-E04 (2013)
Testing place – NITER Quality Control Lab
Color fastness to perspiration of locally produced face mask fabric
(Acidic)
Sample type
Color change
(1-5)
Color staining (1-5)
Acetate
Cotto
n
Nylon
Polyeste
r
Acrylic Wool
N95 4/5 5 4/5 5 5 4/5 5
Color fastness to perspiration of locally produced face mask fabric
(Basic)
Sample type
Color change
(1-5)
Color staining (1-5)
Acetate
Cotto
n
Nylon
Polyeste
r
Acrylic Wool
N95 4/5 5 4/5 5 5 4/5 5

45. z
Test Name - Colour fastness to rubbing
ISO Method – ISO 105 * 12 (2016)
Testing place – NITER Quality Control Lab
Color fastness to Rubbing of face mask fabrics (Dry condition)
Sample type
Color
change (1-5)
Color staining (1-5)
Acetate Cotton Nylon Polyester Acrylic Wool
N95 5 5 5 5 5 5 5
Color fastness to Rubbing (wet condition)
Sample type
Color change
(1-5)
Color staining (1-5)
Acetate Cotton Nylon Polyester Acrylic Wool
N95 4/5 4/5 4 5 5 4/5 5

46. z
Test Name - Colour fastness to Wash
ISO Method – ISO 105-C06 (2010)
Testing place – NITER Quality Control Lab
Color fastness to wash rating
Sample type
Color
change (1-
5)
Color staining (1-5)
Acetate
Cotto
n
Nylon
Polyeste
r
Acrylic Wool
N95 4/5 4/5 5 5 5 4/5 4/5

47. z
Test name - Anti- bacterial test
Testing place - Bangladesh Atomic Research Institute
No. Of
Observatio
n
Types of
sample
Organisms used Results
1 Mask -N95
Bacillus subtilis
Staphylococcus
aureus
E Coli.
Salmonella enteridis
No zone of inhibition observed
No zone of inhibition observed
No zone of inhibition observed
No zone of inhibition observed
Remarks: There is no antimicrobial activity in these provided samples

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