How to make sunscreen
With the arrival of summer, sunscreen has become a must-have for people's daily skin care. Recently, hot topics about sunscreen on the Internet mainly focus on homemade sunscreen, the safety of sunscreen ingredients, and evaluation of sunscreen effectiveness. This article will combine the hot content of the past 10 days to introduce the production method of sunscreen in detail and provide structured data for readers' reference.
1. Essential ingredients for homemade sunscreen
Making your own sunscreen requires choosing ingredients that are natural and have sun protection properties. Here are common ingredients and their sun protection factor (SPF) references:
| Ingredients | Sun protection factor (SPF) | Efficacy |
|---|---|---|
| zinc oxide | 2-20 | Physical sun protection, reflecting UV rays |
| coconut oil | 4-10 | Moisturizing with natural sun protection effect |
| shea butter | 6-10 | Moisturizes skin, antioxidant |
| Red Raspberry Seed Oil | 25-50 | High SPF, anti-aging |
| Vitamin E | No direct SPF | Antioxidant, enhance sun protection effect |
2. Steps to make homemade sunscreen
Here are the detailed steps for making a simple sunscreen:
1.Prepare materials: Zinc oxide powder (10g), coconut oil (30ml), shea butter (20g), vitamin E oil (5 drops), essential oil (optional, such as lavender essential oil).
2.mixed carrier oil: Heat coconut oil and shea butter over water until melted, stir evenly.
3.Added sunscreen ingredients: Add zinc oxide powder and stir until completely dissolved to avoid clumping.
4.Add antioxidants: Drop in vitamin E oil and essential oil and continue stirring.
5.Cool storage: Pour the mixture into a clean container and let it cool before use.
3. Things to note when making your own sunscreen
1.SPF test: The SPF value of homemade sunscreen is difficult to accurately control. It is recommended to use it in a non-strong ultraviolet environment, or to combine it with other sun protection measures.
2.Skin test: Before first use, test a small area on the inside of your arm to confirm there is no allergic reaction.
3.shelf life: Since it does not contain preservatives, homemade sunscreen should be used within 1 month and stored in a cool place.
4. Inventory of popular sun protection topics on the Internet
In the past 10 days, the following sun protection-related topics have become more popular:
| topic | heat index | Main discussion points |
|---|---|---|
| Chemical sunscreen vs physical sunscreen | 85% | Safety comparison, applicable skin type |
| Reasons for applying sunscreen mud | 78% | Ingredient conflicts, application techniques |
| Recommended sunscreen for children | 92% | No additives, mild formula |
| Sunscreen waterproof test | 65% | Effects in swimming and sweating scenarios |
5. Suggestions for daily use of sunscreen
1.Adequate dosage: Use about 1 yuan coin-sized amount of sunscreen on the face and about 30ml on the whole body.
2.Frequency of recoating: Reapply every 2-3 hours, immediately after swimming or sweating.
3.Pair with hard sunscreen: It is recommended to use physical sun protection methods such as sun hats and sunglasses for better results.
Through the above content, I believe everyone has a more comprehensive understanding of the production and use of sunscreen. Whether you make your own or buy finished products, proper sun protection can effectively protect your skin health!
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