The purpose of this hand washing test was to evaluate the supplied product for performance following cleaning requirements.
Date Run:
08/27/2024
Experiment Procedure:
The experiment begins with taking pictures of participants initial conditions of their palms. Afterwords synthetic carpet soil diluted with water to form paste (5g/20ml) and a quater size is placed in the palm of one hand. The participant rubs their palms together for 20 seconds covering their entire palm and fingers and then the participants rinse their hands for 20 seconds with 2 squirts of soap. Afterwards, the participants blot their hands dry for 20 seconds and then air dry for each time after recording their answers for cleanliness, rinsing, and skin conditions. Skin conditions are recorded at 1 minute, 5 minutes, 20 minutes, and 60 minutes after rinsing and drying hands.
Observed skin condition at 1, 5, 20, and 60 minutes:
1 - smooth and dry
2 - some dryness
3 - Dry hands, turning white
4 - skin stiffening
5 - very dry, cracking of skin
Trial Results:
Person
Participant
Soap
Clean
Rinse
1 Minute
5 Minutes
20 Minutes
60 Minutes
A
Gabriel
A
3.5
1
1
1
1.5
1.5
B
4.5
1
2
2
1.5
1.5
B
Tatyanna
A
4
2
1
1.5
1.5
1.5
B
4.5
2.5
2
3
3
3
C
Cindy
A
2.5
1
1.5
1.5
1.5
1.5
B
3
2.5
1.5
1.5
1.5
2
D
Liz
A
3.5
3
1
2
2.5
2.5
B
1
1
1.5
2
2
2
E
Stephan
A
2.5
1
1.5
1
1
1
B
3
1.5
2.5
2
2
2
F
Alex
A
4.5
2.5
1
1
1
1
B
3
2
1.5
2
2
1.5
Success Rating:
Preliminary compatibility tests on substrate coupons encouraging for at least one cleaning chemistry. More in-depth laboratory testing necessary.
Conclusion:
The average clean rating among all 6 participants for product A was 3.4 and for product B 3.2. The average rinse rating among all 6 participants was 1.8 for both products. For each rating of time the average rating of skin condition was between 1 and 1.5. Photographs of each subject’s hands before soil, after soiling and after cleaning were taken to document cleaning results.
In summary, product A was comparable in overall performance to the comparative product B.
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