BySIZ Column
Summer skincare starts with
understanding ultraviolet light
The sudden rise in temperature can make summer feel increasingly uncomfortable.
Are your summer essentials ready? Today we review ultraviolet light and sunscreen use for summer skincare.
Sunlight is one of the main things to consider in summer.
Sunlight includes two types of ultraviolet light that affect the skin: UVA and UVB. Although their names are similar, they affect the skin differently, so understanding the distinction helps with care.
Two types of ultraviolet light that affect the skin
UVA
Longer wavelengths that can reach the dermis
UVA is an everyday form of ultraviolet light that is relatively less affected by the season and weather. It can be associated with pigmentation such as melasma, freckles and age spots.
It can also affect collagen in the dermis and contribute to reduced elasticity and wrinkles, making it relevant to skin-aging care.
UVB
Shorter wavelengths with greater energy
UVB deserves particular attention during strong summer sunshine. Some is blocked by clouds or window glass, but it delivers relatively high energy to the skin.
Redness after sun exposure at the beach may be related to UVB. Days with substantial outdoor activity call for careful protection.
How to use sunscreen
Apply sunscreen to help protect your skin. Use enough and reapply rather than assuming one application lasts all day.
1. At least 30 minutes before going out
Apply in advance so it can spread evenly and settle on the skin.
2. An amount roughly the size of a Korean 500-won coin
Spread a sufficient amount evenly over the whole face rather than applying too thinly.
3. Reapply every 2–3 hours
Sweat, sebum and friction can weaken the protective layer, so reapply regularly during outdoor activities.
Understanding SPF and PA
You may have seen labels such as SPF 30, SPF 50, PA+ or PA++. SPF and PA relate to protection against different ultraviolet wavelengths.
SPF
A measure associated with UVB protection
SPF indicates protection against UVB-related skin reddening. A higher number indicates a higher stated UVB protection level.
PA
A measure associated with UVA protection
PA indicates protection against UVA, which may affect pigmentation and skin aging. More plus signs indicate a higher stated UVA protection level.
Choose protection suited to your circumstances
Protection needs vary with weather, season, time outdoors and activity. Consider different product choices and reapplication intervals for mainly indoor days and extended outdoor activity.
Understanding UV types and sunscreen labels makes choosing a product easier. Protect your skin and enjoy a pleasant summer despite the heat.
BySIZ Column
Summer skincare starts with
understanding ultraviolet light
The sudden rise in temperature can make summer feel increasingly uncomfortable.
Are your summer essentials ready? Today we review ultraviolet light and sunscreen use for summer skincare.
Sunlight is one of the main things to consider in summer.
Sunlight includes two types of ultraviolet light that affect the skin: UVA and UVB. Although their names are similar, they affect the skin differently, so understanding the distinction helps with care.
Two types of ultraviolet light that affect the skin
UVA
Longer wavelengths that can reach the dermis
UVA is an everyday form of ultraviolet light that is relatively less affected by the season and weather. It can be associated with pigmentation such as melasma, freckles and age spots.
It can also affect collagen in the dermis and contribute to reduced elasticity and wrinkles, making it relevant to skin-aging care.
UVB
Shorter wavelengths with greater energy
UVB deserves particular attention during strong summer sunshine. Some is blocked by clouds or window glass, but it delivers relatively high energy to the skin.
Redness after sun exposure at the beach may be related to UVB. Days with substantial outdoor activity call for careful protection.
How to use sunscreen
Apply sunscreen to help protect your skin. Use enough and reapply rather than assuming one application lasts all day.
1. At least 30 minutes before going out
Apply in advance so it can spread evenly and settle on the skin.
2. An amount roughly the size of a Korean 500-won coin
Spread a sufficient amount evenly over the whole face rather than applying too thinly.
3. Reapply every 2–3 hours
Sweat, sebum and friction can weaken the protective layer, so reapply regularly during outdoor activities.
Understanding SPF and PA
You may have seen labels such as SPF 30, SPF 50, PA+ or PA++. SPF and PA relate to protection against different ultraviolet wavelengths.
SPF
A measure associated with UVB protection
SPF indicates protection against UVB-related skin reddening. A higher number indicates a higher stated UVB protection level.
PA
A measure associated with UVA protection
PA indicates protection against UVA, which may affect pigmentation and skin aging. More plus signs indicate a higher stated UVA protection level.
Choose protection suited to your circumstances
Protection needs vary with weather, season, time outdoors and activity. Consider different product choices and reapplication intervals for mainly indoor days and extended outdoor activity.
Understanding UV types and sunscreen labels makes choosing a product easier. Protect your skin and enjoy a pleasant summer despite the heat.