Measurement Guide

1. Skin condition

There are 4 primary categories of skin condition: normal, dry, oily, and combination. However, your skin condition varies greatly during the course of your life. The many internal and external factors that determine skin condition include: climate and pollution, medication, stress and genetic factors that influence the levels of sebum and moisturizing factors that your skin produces as well as the products that you use and the skincare choices that you make. The Chowis Skin Analyzer offers a convenient and efficient way for you to determine a customer's skin condition. The onboard corneometer uses capacitance sensors to accurately measure the hydration level for both T-zone and U-zone.

Figure 1. Corneometer capacitance sensor of the Chowis skin analyzer

Absorbent sebum strips are provided for the diagnosis of skin sebum.

Figure 2. Skin sebum strips

Press the sebum strip moderately onto skin for 10 seconds, remove sebum strip and take an image with the PPL light mode of our Chowis Skin Analyzer. Repeat the process for both T-zone and U-zone. Our algorithms then evaluate both the hydration level and sebum level to provide the grading for skin condition.

2. Chowis skin condition grade

The following scales has been co-developed by Chowis and Dermatology experts. For moisture, we average the moisture scores of t-zone and u-zone to get the overall hydration level. For skin sebum, our algorithm detects sebum spots in the captured images and compute the average as the sebum level. Based on the scale shown in Table 1, we grade skin condition into normal, dry, oily and combination for both t-zone and u-zone. Following Table 2, we combine skin conditions of t-zone and u-zone to get final skin type. To get accurate estimation of skin condition, make sure you measure moisture and sebum for both t-zone and u-zone.

Table 3. Representative skin conditions

Normal
Dry
Oily
Combination

3. Skin age

The age of your skin is determined by a lot more than a date on the calendar. Many things, including genetics, your lifestyle, and environment play a role in how old your skin appears. The two dominating impetuses, among all of them, are the loss of collagen, elastin and hyaluronic acids, and the extent of sun exposure. Firstly, loss of connective tissues promotes the formation of wrinkles. Secondly, sun exposure accelerates the breakdown of connective tissues and causes uneven skin pigmentation such as spots and freckles. On this basis, we co-developed a skin age computation formula with dermatology experts considering wrinkles measurement results, spots measurement results, and real biological age.

Figure 3. Skin age

To get correct skin age estimation, it is essential to carry out both wrinkles and spots measurements. In case either measurement is skipped, or both measurements are not performed, we show the biological age as skin age.

4. Skin weakness

We identify your skin weaknesses as the top two skin measurements that you performed poorly. These weaknesses represent areas of focus in skincare and product recommendations. To better identify your actual skin weaknesses, a full spectrum of skin analysis is recommended.

Figure 4. Skin weaknessess

5. Radar graph and bar graph

To help you gain insights in your skin diagnosis, we visualize the results using radar graph and bar graph. In the radar graph, the nearer a dot is located to the center, the better that skin attribute is.

Figure 5. Radar graph for skin diagnosis results

In the bar graph, we convey for each skin attribute how well you perform when compared with the average. The lesser the color that fills your bar, the worse that skin attribute is.

Figure 6. Bar graph for skin diagnosis results