Sunscreen OEM manufacturing: formula, testing and compliance

The short answer

A sunscreen project runs late for one reason far more often than any other: the pack copy cannot be written until an accredited laboratory has tested the finished formula on human volunteers, and that laboratory is usually booked weeks ahead. Everything before it — the texture, the fragrance, the packaging, the fill weight — is ordinary skincare work. The SPF is the part that keeps its own calendar.

That has a practical consequence for anyone briefing a factory. If the destination market and the exact claim you want are decided at the end of development instead of the beginning, you will pay for testing twice. Deciding them early is the single cheapest thing you can do to shorten the project.

Why sunscreen is not another skincare product

In most of skincare the claim follows the formula. A formulator decides a cream is rich enough to be called nourishing, and the word goes on the pack. In sun care the claim follows a measurement. You cannot decide that a product is SPF 50; you can only design towards it and then find out what the laboratory reports.

Three things follow from that, and they are what make the category different from a moisturiser or a serum:

The ingredient list is not yours to choose freely. UV filters are restricted substances. Each market publishes its own permitted list with its own maximum concentrations, and a filter that is routine in one country may not be permitted at all in another.

The product category changes by country. In the United States a sunscreen is an over-the-counter drug. In the European Union the same cream is a cosmetic. That single difference changes the testing method, the labelling, the paperwork and who is responsible for what.

Any formula change invalidates the report. Adjust the filter level, swap a thickener, change the emulsifier — the tested article is no longer the article you are selling. This is the most expensive misunderstanding in the category, and it is entirely avoidable.

The US and the EU ask different questions

The two largest markets for private-label sun care are also the two that diverge most. Both want the SPF measured on the finished formula, but they ask for different evidence, allow different filters and require different panels on the pack.

The American list is fixed and comparatively short. If the filter system you want is not on the monograph, the product cannot be sold there without being rebuilt around one that is — which is why a formula developed for Europe sometimes arrives at the US border as a different product entirely. Drug labelling also prescribes the pack: the panel, its order and its wording are not a design choice.

The European list is longer, which gives more room to work on texture and finish. The catch is the UVA rule: because UVA protection has to reach one third of the SPF, pushing the SPF up pulls the UVA requirement up with it. A high-SPF product that measures well on UVB can still fail the ratio.

Japan and Korea add a third system — the PA rating — which is why so many Asian sunscreens print both an SPF and a PA class. A product sold in all three markets has to satisfy all three sets of rules simultaneously, which is possible but has to be designed in from the start rather than retrofitted.

For a private-label brand the practical reading is simple: name the destination market in the first conversation. It decides which filters we can shortlist, which test plan applies, and whether the pack you have in mind has room for the panel the regulation requires.

What the number on the pack has to be backed by

An SPF value is the ratio of the time it takes protected skin to burn against the time it takes unprotected skin to burn, measured across a panel of volunteers under controlled UV. It is a clinical measurement performed on people, not a calculation from the filter percentages in the formula.

That has three consequences worth knowing before you brief anyone:

The lab tests the finished product, not the ingredients. Two formulas with identical filter levels can measure differently, because the film they form on skin is different. This is why an “SPF 50 formula” bought from a catalogue is not the same thing as a product that has been measured at SPF 50.

Water resistance is a separate claim and a separate test. If the pack says the product stays effective after 40 or 80 minutes in water, that has to be demonstrated. Adding the claim after the SPF test means going back to the lab.

The report is a document you keep. Distributors, retailers and, in some markets, importers will ask for it. Treat it as part of the product file rather than as a formality that ends when the pack is printed.

Mineral or organic: the market usually decides

“Mineral” means zinc oxide or titanium dioxide; “organic” in this context means the carbon-based filters most people call chemical. Neither is inherently better, and the choice is usually made by the destination market and the positioning rather than by preference.

Mineral systems carry a shorter permitted list, which makes them simpler to defend across markets, and they suit baby, children’s and sensitive-skin ranges. The trade-off is a visible cast on skin at higher SPF, and a texture that is harder to make pleasant. Dispersion matters more than the percentage on the label: a poorly dispersed mineral can measure well below its nominal protection.

Organic systems give a clear finish and more formulation freedom in the EU, where the permitted list is longer. In the United States the list is much shorter, so a formula designed around European filters may simply not be sellable there without being rebuilt.

Hybrid systems — a mineral plus one or two organic filters — are common for exactly this reason. They let a brand keep a “mineral-led” story while still reaching a high SPF with a wearable texture. If you have a positioning in mind, say so at the brief stage; it changes which filters are worth shortlisting.

Where the calendar actually goes

The development itself is not slow. Sampling is measured in days — ours run at seven to ten days per round. What stretches a sunscreen project is the sequence after the formula is frozen, and it helps to see the whole line at once.

1. Brief. The destination market is named, and the filter shortlist follows from it.
2. Formula. Samples run at seven to ten days per round, and usually take more than one.
3. Stability. Accelerated data has to exist before a laboratory will test the product on people.
4. SPF and UVA. Measured on the finished formula by an accredited laboratory, in your destination market.
5. Pack copy. The claim, the panel and the warnings are written after the report comes back.
6. Production. Starts once the label can be defended, not before.

Two practical points about that sequence. First, stability data usually has to exist before a laboratory will accept the sample for human testing, so the two stages cannot simply run in parallel. Second, laboratory slots are booked in advance; the time to reserve one is when the formula is frozen, not when the sample comes back approved.

The other thing worth planning around is the pack. The claim, the panel and the warnings are all written after the report arrives, which means artwork sign-off sits downstream of the laboratory rather than beside it. Brands that design the pack early and leave the copy fields open move noticeably faster than brands that design the whole label and then wait.

Four places sunscreen projects stall

1. The destination market is decided late. The formula gets built around one market’s filter list, then a distributor asks for another market and the work has to be redone. Naming the markets in the first message costs nothing.

2. A claim is added after testing. Water resistance, “reef safe”, “for sensitive skin” — each of these carries evidence requirements. Adding one after the report means a second round at the laboratory.

3. The packaging cannot take the required copy. A Drug Facts panel needs a flat, readable area. A very small stick or a heavily curved bottle can leave nowhere to put it. This is worth checking against the artwork before the packaging is ordered, not after.

4. The formula is adjusted after the SPF test. A small change to feel or stability is still a change to the tested article. If the texture needs work after the report, budget for retesting rather than assuming the old number still applies.

What to send us

If you are briefing a sunscreen project, these six points are enough for a useful first reply:

the countries where it will be sold; the SPF and UVA claim you are aiming for; the format you have in mind, whether lotion, cream, stick or pump; whether you want mineral, organic or no preference; the packaging you are considering; and your target quantity and timing. A reference product helps as well — it is faster to work from something you already like than from adjectives.

We manufacture sun care to order from 1,000 units per SKU, in lotion, cream, stick, pump and after-sun formats, and we arrange the testing with an accredited laboratory for the market you are selling into. What we do not do is quote a number before the measurement exists — a supplier who promises you a specific SPF on the first call is describing a catalogue product, not a development project.

To see the formats we build, look at the sun care OEM range; for how the project runs end to end, read the six-step manufacturing process; for the factory and its certifications, see the factory page. If you are still choosing a supplier, how to choose a cosmetics manufacturer covers the questions worth asking, and OEM versus ODM explains who ends up owning the formula.

If you already know the market and the claim, send us the brief and we will come back with the format options, the test plan and the quantity on the same basis.

For the SPF and claim details behind a sunscreen line, our skincare OEM/ODM page covers what an OTC-adjacent product has to clear.