I just bought sunscreen, what does the number after the A printed on the sunscreen mean?

Hello, Know Me Cosmeceutical Skin Consultant is happy to help you.

SPF is the English abbreviation of Sun Protection Factor, which is the ability of sunscreen skin care products to protect against ultraviolet rays. The higher the SPF index, the greater the protection given to **.

Different SPF values indicate different amounts of time for effective sun protection. Specifically:

SPF 15 = 15 * 10 = 150 minutes.

SPF 20 = 20* 10 = 200 minutes.

SPF 30 = 30 * 10 = 300 minutes.

SPF 50 = 50* 10 = 500 minutes.

PA stands for UVA (UVA is the effect of aging skin**) and is a Japanese sun protection index measure that measures the stability of persistent melanin deposits (PPD) after 2-4 hours of sun exposure. The more PA+, PA++, and PA+++ words are, the better the effect of UVA protection and the longer the effective protection time.

PA+: Indicates that it is effective, and the protection time is about 2 to 4 hours.

PA++ means quite effective, with a protection time of 4 to 8 hours.

PA++ means quite effective, with a protection time of 4 to 8 hours.

A+ is the sun protection index, and the following number 15 minutes is the sun protection time.

The higher the UV protection index + number, the higher the SPF.

The value on the sunscreen is the sunscreen factor (SPF).

Sun Protection Factor (SPF) refers to the SPF sun protection factor, which is a detection index that measures the ability of sunscreen products to defend against ultraviolet rays in the sun, indicating the level of sunscreen efficacy that sunscreen products can play. It is determined based on the lowest erythema dose.

People who have been indoors for a long time can choose sunscreen products with SPF10 and PA+; People who are often outdoors, easy to tan, and sensitive to strong light can choose SPF20 or so, PA++; If you work under the scorching sun for a long time or go to the seaside mold shed to play, it is best to choose a strong sunscreen product with SPF30 and PA+++. Daily use of SPF15-25, PA++ is sufficient.

Hello, 8309AB is the sunscreen rating of sunscreen, which is regulated by the Food and Drug Administration (FDA) of the United States and is used to indicate the sunscreen effect of sunscreen. 8309AB represents a sunscreen rating of 8, where 8 means that the sunscreen has a sun protection factor (SPF) of 8, while AB means that the sunscreen has a sun protection factor (PA) of A and B. SPF indicates the protective effect of sunscreen against ultraviolet rays, PA indicates the antioxidant effect of sunscreen mega cream against ultraviolet rays, and grades A and B indicate the comprehensive level of protection and antioxidant effect of sunscreen.

Therefore, 8309AB indicates that the sunscreen has a sun protection rating of 8, and its sun protection factor (SPF) is 8, while the sun protection factor (PA) is a grade A and B, which has a high sun protection effect.

The more PA++ plus signs on the sunscreen, the stronger the sun protection ability, one plus sign means that the sun protection factor is 15, which can protect the sun for 150 minutes, two plus signs means that the sun protection factor is 25, and the more the number of the number after the SPF, the stronger the sun protection index.

Generally speaking, PA is the sun protection ability, the more plus signs indicate the higher the sun protection ability, two plus signs indicate a sun protection factor of 25 and a sun protection time of 250 minutes, and three plus signs indicate a sun protection factor of 30 and a sun protection time of 300 minutes. The higher the sun protection ability, the longer the sun protection time will be, which is more suitable for people who exercise outdoors for a long time or work outdoors.

The higher the SPF index, the longer the protection period is given, and the stronger the sun protection effect. The more common types on the market are SPF10, SPF30, SPF50, with SPF1 as the unit, it can play a role in blocking ultraviolet rays for 15 minutes in the sun, taking SPF30 as an example, the time that can block ultraviolet rays is 15*30=450 minutes, more than 7 hours, and the time and effect of sunscreen also increase with the increase of value. Shout cover.

Different sunscreen products have different suitable people, and you can choose the right product according to your time under UV exposure.

The A-index represents the duration and strength of anti-UBA, which simply means the ability to prevent skin tanning.

A The more + the index, the stronger the ability to prevent tanning, so the sun protection effect of A++ is stronger than that of A+, and A+++ is currently the strongest ability to prevent skin tanning.

The numbers refer to the sun protection time, specifically: SPF 15 = 15 * 10 = 150 minutes, SPF 20 = 20* 10 = 200 minutes, SPF 30 = 30 * 10 = 300 minutes, SPF 50 = 50* 10 = 500 minutes.

In other words, the sun protection time of A+20 is more than A+15.

Hello, Know Me Cosmeceutical Skin Consultant is happy to help you.

SPF is the English abbreviation of Sun Protection Factor, which is the ability of sunscreen skin care products to protect against ultraviolet rays. The higher the SPF index, the greater the protection given to **.

Different SPF values indicate different amounts of time for effective sun protection. Specifically:

SPF 15 = 15* 10 = 150 minutes SPF 20 = 20* 10 = 200 minutes SPF 30 = 30 * 10 = 300 minutes SPF 50 = 50* 10 = 500 minutes PA stands for the protective effect of sunscreen products against UVA (UVA is the result of aging skin**), a Japanese SPF measurement standard that is measured by the stability index of persistent melanin deposits (PPD) after 2-4 hours of sun exposure. The more PA+, PA++, and PA+++ words are, the better the effect of UVA protection and the longer the effective protection time.

PA+: Indicates that it is effective, and the protection time is about 2 to 4 hours.

PA++ means quite effective, with a protection time of 4 to 8 hours.

PA++ means quite effective, with a protection time of 4 to 8 hours.

The higher the UV protection index + number, the higher the SPF.