Sunscreen was popularized between the 1940s and 1970s. While early chemical formulas emerged in the 1930s, widespread adoption took off during World War II when soldiers needed sunburn protection in tropical climates. Post-war leisure culture, followed by the introduction of the Sun Protection Factor rating system in the 1960s and 1970s, turned sunscreen into a mainstream household staple.

Understanding how sun protection evolved from greasy ointments into essential daily skincare helps clarify why modern formulas work the way they do and how to choose the most effective product for your routine.

Early Inventions: From Folk Preparations to Battlefield Formulations

Before commercial sunscreens existed, people relied on physical barriers, wide-brimmed hats, tightly woven clothing, and natural pastes made from minerals like zinc or plant extracts like olive oil and rice bran. While these traditional methods offered modest shade or soothing relief, they lacked standardized ultraviolet filtration. The foundation for modern chemical sunscreens took shape during the 1930s when independent chemists in Australia and Europe began experimenting with synthetic UV-absorbing compounds. Australian chemist Milton Blake experimented with aromatic chemical filters to create commercial creams, while French chemist Eugène Schueller, the founder of L'Oréal, introduced Ambre Solaire in 1935 to cater to the growing French trend of seaside holidays.

The pivotal turning point for widespread utility arrived during World War II. Allied troops deployed in the Pacific theater faced debilitating sunburns that compromised combat readiness and basic health. In response, Florida pharmacist and airman Benjamin Green utilized a heavy, petroleum-derived substance known as Red Veterinary Petrolatum, commonly called Red Vet Pet. This thick, viscous red paste served as a physical shield against the harsh tropical sun. While uncomfortable and cosmetically unappealing, Red Vet Pet proved to military authorities and the public alike that a topical preparation could reliably prevent severe solar radiation damage in extreme environments.

Post-War Commercialization: The Rise of Mid-Century Beach Culture

Following the conclusion of World War II, returning veterans and a booming domestic economy sparked a profound cultural transformation centered on outdoor recreation, suburban pools, and coastal vacations. Recognizing the commercial potential of his wartime experience, Benjamin Green refined his heavy petroleum formula by blending it with cocoa butter and coconut oil, establishing the Coppertone brand in the late 1940s. The brand captured public attention during the 1950s through widespread advertising, making sun care products accessible at neighborhood pharmacies and grocery stores across the United States.

During this mid-century period, public attitudes toward sun exposure differed significantly from modern medical consensus. Sun products were primarily marketed as tanning aids that allowed beachgoers to achieve a deep golden complexion without suffering immediate, painful blistering. Formulations focused almost exclusively on blocking shorter UVB rays—the wavelengths responsible for visible surface burning—while allowing deeper-penetrating UVA rays to stimulate melanin production. Although this focus left deeper skin layers unprotected from long-term photoaging, it established topical sun lotions as an indispensable element of warm-weather leisure.

The 1960s and 1970s: Establishing Scientific Standards and SPF

As commercial availability expanded throughout the 1960s, consumers and dermatologists faced a major challenge: there was no uniform method to compare the protective strength of different lotions. This changed largely through the work of Austrian chemist Franz Greiter. After experiencing severe sunburn while climbing Mount Piz Buin in 1938, Greiter developed his own sun cream and subsequently introduced the concept of the Sun Protection Factor, or SPF, in 1962. SPF provided a measurable baseline by calculating how much longer skin covered in sunscreen could withstand UVB radiation before burning compared to unprotected skin.

The introduction of the SPF metric revolutionized the skincare industry during the 1970s. In 1978, the United States Food and Drug Administration initiated formal rulemaking to evaluate and regulate over-the-counter sunscreen ingredients, establishing official testing methodologies for SPF ratings. This regulatory shift transformed sunscreen from an unregulated cosmetic tanning lotion into a standardized functional healthcare product, giving shoppers objective criteria to choose the level of defense their skin required.

The 1980s and 1990s: Shifting Priorities from Tanning to Skin Health

The final two decades of the twentieth century brought a fundamental shift in how the public viewed the sun. High-profile scientific discoveries regarding the depletion of the stratospheric ozone layer generated widespread public concern about increased ultraviolet exposure. Concurrently, medical organizations and public health campaigns began actively educating consumers on the direct links between cumulative sun damage, premature skin aging, and skin cancers such as melanoma and basal cell carcinoma.

This era also broadened scientific understanding of ultraviolet light. Researchers demonstrated that UVA rays, which penetrate through window glass and do not immediately cause redness, penetrate deep into the dermis to break down collagen and damage cellular DNA. Skincare manufacturers responded by developing broad-spectrum formulations containing stabilized chemical filters like avobenzone as well as refined physical minerals like zinc oxide and titanium dioxide. Sunscreen began migrating away from seasonal beach bags and into year-round daily facial moisturizers.

The Modern Era: Cosmetic Elegance and Daily Skincare Norms

In recent years, the sunscreen landscape has evolved through major advancements in cosmetic chemistry and formulation design. Historically, consumers frequently avoided daily sunscreen use due to heavy, greasy textures, strong chemical odors, or the conspicuous white cast left behind by traditional mineral formulas. Modern manufacturing techniques, including the micronization of mineral particles and the development of lightweight polymer delivery systems, have yielded invisible, weightless finishes suitable for diverse skin tones and skin types.

The global exchange of beauty practices, particularly the influence of East Asian skincare routines, has further normalized daily, high-protection sunscreen application as an essential step rather than an occasional chore. Today, sunscreens are formulated as mattifying fluids, hydrating gels, and tinted mineral shields that integrate seamlessly under makeup or alongside active skincare ingredients like vitamin C and retinoids, ensuring photoprotection can be practiced consistently without compromising skin comfort.

Applying Historical Lessons to Your Modern Sun Care Routine

Understanding how sun care has advanced enables you to make informed, practical decisions about your daily regimen. A primary lesson from the evolution of SPF is that no single application provides complete or permanent immunity from ultraviolet rays. Regardless of whether a formula relies on mineral blockers, organic chemical absorbers, or a hybrid combination, consistent coverage and regular reapplication remain the true determinants of real-world efficacy.

When building a dependable sun protection routine, balance your skin type requirements with your lifestyle demands rather than pursuing an excessively high SPF number alone. An SPF 30 to SPF 50 product that feels comfortable on your face and does not irritate your eyes is far superior to a thicker SPF 100 cream that you avoid using regularly.

  • Select broad-spectrum products that clearly indicate defense against both UVB rays that burn and UVA rays that age the skin.
  • Apply approximately two finger lengths of sunscreen to your face and neck to achieve the tested level of protection indicated on the packaging.
  • Reapply every two hours during prolonged outdoor activity, or immediately after heavy sweating or towel drying.
  • Pair topical sunscreen with shade, protective clothing, and sunglasses for complete ultraviolet defense.

Frequently asked questions

Did people use sunscreen before the twentieth century?

Before modern chemical and mineral lotions were invented, people relied on physical shade, dense clothing, wide-brimmed hats, and mineral-rich mud or botanical oils to shield their skin. While these historical methods provided modest protection against direct sunlight, they were not standardized or scientifically measured like modern broad-spectrum formulas.

What is the difference between early sunscreens and modern formulations?

Early commercial sunscreens were designed mainly to prevent visible surface sunburns and promote tanning by filtering only UVB rays. Modern formulations offer broad-spectrum defense against both UVA and UVB rays, prioritize lightweight cosmetic elegance, and are formulated for safe, daily year-round wear.

Why did the SPF rating system become necessary?

The SPF rating system was developed in the 1960s to establish a standardized, objective measurement of how well a product prevents sunburn. Prior to SPF ratings, consumers had no reliable way to gauge the comparative strength or duration of protection offered by different commercial brands.

Your next step

Assess your current sunscreen to verify that it offers broad-spectrum protection with at least SPF 30, and make applying a comfortable two-finger amount the consistent final step of your morning skincare routine.