Sunscreen Third-Party Manufacturing in India: SPF Testing, Filters and Timelines

Third-party sunscreen manufacturing in India follows the same brief, sample and production steps as other skincare, but the SPF and UVA claims on the label must be supported by recognised test methods, which adds time. Plan for filter selection, texture work, stability and protection testing before artwork is final.

Sunscreen is often the product that turns a skincare brand into a daily habit, which is why so many founders want one in their first range. It is also the product most likely to delay a launch. As a skincare manufacturer in India, Harrods Health makes sunscreens alongside serums, moisturisers and cleansers, and this guide explains what makes sun protection different, so you can plan it properly.

Why sunscreen is different from other skincare

With a moisturiser, the main promise is a feeling: hydrated, soft, comfortable. With a sunscreen, the main promise is a number. "SPF 50" and "broad spectrum" or "PA++++" are measurable claims, and regulators and marketplaces expect them to be supported by data generated with recognised methods. That changes the project in three ways:

• the filter system has to deliver the protection you want to print;
• the texture has to stay cosmetically pleasant despite a high load of filters;
• the finished formula has to be tested for protection, which takes time and must be repeated if the formula changes.

UV filters: the core of the formula

UV filters are the ingredients that absorb, scatter or reflect ultraviolet light. They are usually grouped into two families.

Mineral (inorganic) filters

Zinc oxide and titanium dioxide sit on the skin and reflect and scatter UV. They are popular for sensitive-skin and "mineral" positioning. The trade-off is texture: higher mineral loads can leave a white cast and feel heavier, so particle type, coating and dispersion matter. Tinted versions can help reduce visible cast.

Organic (chemical) filters

Organic filters absorb UV energy. They generally allow lighter, more transparent textures such as gels, fluids and serums. Most high-SPF, broad-spectrum products combine several filters, because no single filter covers the full UVB and UVA range on its own.

Hybrid systems

Many modern sunscreens blend mineral and organic filters to balance protection, feel and cast. Whatever system you choose, check that every filter is permitted, and at the level used, in each market you plan to sell in. Permitted filter lists and maximum concentrations differ between India, the EU, the UK, the US and other regions, so a sunscreen designed for one market may need reformulating for another.

Textures brands ask for

Format	Typical feel	Notes for brands
Cream	Richer, moisturising	Suits dry skin; easiest base for mineral filters
Lotion or fluid	Light, spreadable	Common for daily face and body use
Gel or gel-cream	Fresh, non-greasy	Popular in warm, humid climates and for oily skin
Serum or essence	Very light, layerable	Appeals to skincare-first customers; demanding to formulate
Tinted	Light coverage	Helps offset mineral cast; shade range adds complexity
Stick	Solid, portable	Convenient for reapplication; different packaging and filling

Browse ready options in our sunscreen formula collection. Sunscreens often sit at the end of a morning routine, so it helps to plan them together with your serums and moisturisers; our guide to building a skincare launch range covers how they fit together.

SPF and UVA testing in general terms

The SPF number describes protection mainly against UVB. Internationally, ISO 24444 is the recognised in-vivo method for determining SPF, where the product is tested on volunteers under controlled conditions. UVA protection is assessed separately. ISO 24442 is an in-vivo method for UVA protection, and ISO 24443 is an in-vitro method that measures UVA protection on a substrate in the laboratory. Different markets accept different methods and labelling formats, such as a UVA logo, a PA rating or "broad spectrum" wording, so the test plan should follow the markets you sell in.

Three practical points for brands:

1. Test the final formula. Results apply to the exact formula tested. A change in filter level, emollient or even fragrance may need new testing.
2. Use accredited, independent laboratories where your market expects it. Ask which method was used and keep the full report on file.
3. Label to the result, not to the target. If testing supports SPF 40, the label should not say SPF 50.

Water-resistance claims, where permitted, need their own testing, and so do any claims about blue light or infrared, which should be approached with care.

Claim rules to respect

Sun protection claims attract close scrutiny. Wherever you sell, these principles generally apply:

• Do not claim total protection. Terms such as "sunblock" or "100% protection" are widely discouraged or not allowed.
• Keep directions clear: apply generously before sun exposure and reapply, especially after swimming, sweating or towelling.
• Avoid suggesting the product treats sunburn, pigmentation or any skin condition.
• Make sure SPF and UVA claims match the test reports.

Regulatory status also differs. In India and the EU, sunscreens are treated as cosmetics. In the United States, sunscreens are regulated as over-the-counter drugs, with separate requirements for active ingredients, testing and labelling. If you plan to export, confirm the current rules for each destination with a regulatory adviser; our guide to exporting skincare from India sets out the main frameworks.

Why sunscreen takes longer

Founders are often surprised that a sunscreen can take noticeably longer than a serum. The extra time usually comes from:

• Formula work – balancing filter load, texture and cast takes more sampling rounds.
• Stability – filters must stay dissolved or dispersed, and the emulsion must hold, across temperature changes.
• Protection testing – laboratory scheduling and reporting add weeks, and any formula change can mean repeating tests.
• Artwork – the label cannot be finalised until the protection figures are confirmed.

The practical answer is to start sunscreen first. Lock the formula early, sequence testing before packaging artwork, and launch your other products while the sunscreen completes its work if needed. Our testing and quality page explains how product testing is coordinated.

Packaging for sunscreen

Tubes are the most common format because they are light, portable and limit air exposure. Pumps suit larger family and body sizes, and airless packs suit lighter fluids. Check packaging compatibility, since some filters and oils can interact with certain plastics or decoration inks, and confirm the pack will survive heat in transit and in a customer's bag.

What Harrods Health brings to a sunscreen project

Harrods Health operates an ISO certified, GMP-compliant facility with a state FDA cosmetic manufacturing licence and is a US FDA registered facility; see our quality certifications. Sunscreens are part of the formula library, custom formulation is available, and samples are provided before you order. Ready formulas start from 500 units per product, and a single account manager coordinates formula, packaging, testing documents and dispatch.

Frequently asked questions

How long does it take to launch a private label sunscreen?

Sunscreen generally takes longer than other skincare because the final formula needs stability work and SPF and UVA testing before the label can be finalised. Starting sunscreen first in your launch plan is the simplest way to protect your timeline.

Which test methods support SPF and UVA claims?

ISO 24444 is the recognised in-vivo method for SPF. UVA protection is commonly assessed with ISO 24442 (in vivo) or ISO 24443 (in vitro). Which methods and labels are accepted depends on the market, so confirm requirements for each destination.

Can I use the same sunscreen formula in every country?

Not always. Permitted UV filters, maximum concentrations and labelling rules differ between markets, and the US regulates sunscreens as over-the-counter drugs. Check each destination before you finalise the formula.

Is a mineral sunscreen better for sensitive skin?

Mineral filters are often chosen for sensitive-skin positioning, but suitability depends on the whole formula. Any sensitive-skin claim should be supported by appropriate testing.

Planning a sunscreen? Talk to our private label skincare manufacturing team about formulas, testing and timelines.