FEATURE COSMETICS FEATURE
‘Blue light is very trendy right now... and cosmetic producers are beginning to think they can protect skin against blue light, as well as UVA and UVB light’
technique is inexpensive, fast and scalable. [It] could appear as a complementary tool for in vitro skin studies... to understand, compare or assess the effectiveness of a treatment with active ingredients.’ Radinov is excited by developments such
as this. ‘At the moment the world is really creative and we are seeing more different approaches,’ he said. Highlighting how such techniques could
www.electrooptics.com | @electrooptics
be used with different immunostaining methods to view, for example collagen and proteins, and also carried out on organs beyond the skin, he added: ‘When you see these beautiful images, they really look magnificent... it’s like the future is already here.’
Mapping moisture Still, there’s more to cosmetic product testing than microscopy. Moisture mapping is widely used in clinical studies to assess the moisture content of the stratum corneum, as well as the micro-topography of the skin. The technique works on the same principle as the classic corneometer, which measures the dielectric constant of the skin, via capacitance sensors. The dielectric constant of skin changes with water content, so the tried-and-tested
corneometer method precisely measures skin hydration. However, moisture mapping uses capacitance imaging to generate maps of hydration distribution across the skin surface. Typically, a sensor containing tens of thousands of micro capacitors measures capacitance levels across the skin surface. These values are then transformed into a range of 256 grey levels to form a non- optical image. Darker pixels represent the more
hydrated, high capacitance regions, while clear pixels represent the dry spots of the skin, as well as any depressions or lines in the stratum corneum that impede contact between the sensor probe and skin. ‘With the classic corneometer you can
see the immediate hydrating effect of a product.... but with our Moisture Map you
July 2021 Electro Optics 13 g
Geinz Angelina/
Shutterstock.com
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50
