BRB 3CvAd 21.qxp_Layout 1 04/05/2021 10:54 Page 1 TESTING And of course, it is also be possible to use
photographic methods to document and count skin lesions.
Area [%]
Class 1 Class 2 Class 3 Class 4 Class 5 All Image area
Desquamation index
12.21 28.34 37.9 13.62 6.02 98.09 100 60.91
Area [mm]
3.52 8.16 10.91 3.92 1.73 28.24 28.8
Blue light Another problem for the skin that has already been described is the prolonged exposure to blue light from monitors that will provoke ageing effects of the skin. The efficiency of products to counter such effects can also be easily tested, using the classic methods applied in anti-ageing research: measurement of skin elasticity and firmness by devices such as the Cutometer® or wrinkle analysis by optical systems. Additionally, ageing effects like irregular pigmentation can be easily assessed by skin colorimetry. Some skin irritations and manifestations
Figure 4: Intelligent desquamation analysis using Corneofix® tapes and the Visioscan® camera.
using specially-adapted pH-meters featuring a wider contact surface with the skin. The face area, where the mask covers
the skin for longer periods, means the measurement of sebum is a factor in the development of acne that might give valuable information. Sebum can be measured by a Sebumeter® or by specific sebum-absorbing tapes such as Sebufix® or Sebutape®. Linked to the sebum production is the activity of the Cutibacterium acnes (syn. Propionibacterium acnes).13
It can be monitored using cameras
emitting a specific UV-spectrum that will cause a fluorescence of the porphyrins produced by these bacteria.14
of acne also occur along the edges of the mask area due to friction and possible contact allergies to the mask material or coatings. It might be interesting to check the irritating potential of the mask material by having it move on the skin surface. The Frictiometer enables you to fix mask material to a sensor head that can be rotated on the skin with a certain speed and for a pre-set duration. A high friction value displayed will already point to a high irritational potential. At the same time, after the standardised
rotation of the mask on the skin with the Frictiometer®, other skin parameters such as TEWL, redness or skin temperature can be measured to show how much the skin has been impacted by the frictional contact. It has also been found that many people
with formerly no problems after wearing the mask for a prolonged period suffer from eye problems, especially dry eye.15
Dry eye
syndrome is a common problem especially with the elderly and for people working for long hours in front of a monitor like we are nowadays forced to do to maintain contact
41
Figure 5: The Mexameter® being a narrowband spectrometer emits specific wavelengths to measure melanin content and erythema in less than a second and display both as two separate values.
www.personalcaremagazine.com June 2021 PERSONAL CARE
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