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Article: The essential concepts to know about SPF

Les notions essentielles à savoir sur les SPF

The essential concepts to know about SPF

Exposure to the sun is an essential part of our daily lives, providing benefits such as the synthesis of vitamin D. However, ultraviolet (UV) rays can cause significant damage to the skin. This is where creams with a sun protection factor (SPF) come in. Understanding the basics of SPF is crucial to effectively protecting your skin from the harmful effects of the sun. This article will guide you through essential information about SPF, their importance, and how to choose and use these products for optimal protection.

What is SPF?

SPF, or Sun Protection Factor, is a measure of a product's ability to protect the skin from UVB rays, the rays that cause sunburn. The SPF number indicates how many times longer you can stay in the sun without burning compared to unprotected skin. For example, SPF 30 means you can stay in the sun 30 times longer without getting sunburned.

UV rays: UVA and UVB

UV rays are divided into two main categories: UVA and UVB.

  • UVB : These rays cause immediate damage such as sunburn. They are also linked to the development of skin cancer.
  • UVA : These rays penetrate deeper into the skin, causing long-term damage like premature aging and also contribute to the risk of skin cancer.

It is crucial to choose a broad-spectrum sunscreen that protects against both types of rays.

Why are SPF creams essential?

  1. Skin Cancer Prevention : SPF creams reduce the risk of developing skin cancers, including melanomas.
  2. Anti-aging : Adequate sun protection prevents signs of premature aging such as wrinkles, fine lines and age spots.
  3. Avoiding Sunburn : Sunburn is not only painful, it also increases the risk of long-term skin damage.

How to choose your SPF?

  1. SPF 30 or higher : SPF 30 is recommended for effective daily protection. For prolonged outdoor activities, a higher SPF may be necessary. Discover our Crystal Bright treatments with an SPF: Crystal Bright Primer SPF30 and Crystal Bright Fluid SFP50+ .
  2. Broad spectrum : Make sure the sunscreen protects against UVA and UVB.
  3. Adapted formulation : Choose a formulation adapted to your skin type. For example, Rexaline's Hydra Shock Light Creme is ideal for combination to oily skin with its mattifying and depolluting effect.

How to apply an SPF cream correctly?

  1. Sufficient quantity : Use a generous amount. Insufficient application reduces the effectiveness of the protection.
  2. Reapply : Reapply every two hours, or immediately after sweating, swimming or toweling.
  3. Daily routine : Apply your SPF cream after your moisturizers and before your makeup for effective daily protection.

Common myths about SPF

  1. “I don’t need sunscreen on cloudy days” : False. UV rays penetrate through clouds and can cause damage even on overcast days.
  2. “A cream with a high SPF protects me all day” : False. Even creams with a high SPF should be reapplied regularly, especially after swimming or sweating.
  3. “Dark skin does not need sun protection” : False. All skin, regardless of color, can experience UV damage and should be protected.

Why choose Rexaline for your sun protection?

Rexaline products, such as Crystal Bright Primer SPF30 , Crystal Bright Fluid SFP50 or our famous Hydra Shock CC Creme SPF20 , (formerly Hydra Divine Foundation Veil) offer integrated sun protection with additional benefits for the skin. This light cream mattifies, hydrates and protects against UV rays, while fighting against the effects of pollution. By integrating this product into your daily routine, you benefit from complete protection and advanced moisturizing care.


Incorporating an SPF cream into your skincare routine is an essential step to protect your skin from sun damage. By understanding the essential concepts about SPF and choosing quality products like those offered by Rexaline, you can maintain the health and beauty of your skin while enjoying the sun safely.

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