How to Evaluate a Nail Cream Sample Before You Put Your Brand On It
We sell our stock packaging from a single unit. This page sets out what to check at your desk, how to trial the wrap routine, which laboratory tests to commission, and what one jar cannot tell you.
What one unit can and cannot tell you
| Question | Answered by one stock unit? | How to answer it |
|---|---|---|
| Does the texture, smell and feel suit my brand? | Yes | Desk checks and the wrap trial |
| Does it leave a tint on nails, skin or bandage? | Yes | The wrap trial, over the full five to seven days |
| Is the salicylic acid where the specification says? | Yes, for that batch | Laboratory assay |
| Is it microbiologically clean? | Yes, for that batch | Laboratory count against ISO 17516 limits |
| Is the next batch the same? | No | Batch certificates of analysis; a second unit from a later batch |
| Is it stable in my packaging? | No | Stability testing on the proof sample in your final pack |
| Is the preservation adequate in my packaging? | No | Challenge test to ISO 11930 on the proof sample |
The six steps
Inspect what arrived
Check the jar, closure and carton for damage, look for a batch code and date of manufacture, and photograph everything before opening. Your own label will need the same traceability.
Record a baseline
Note colour, odour and texture, how the cream spreads at room temperature, and whether it separates. Weigh the full jar so you can check the fill later against the 5 g declared.
Run the wrap routine as the leaflet describes
On an adult volunteer with healthy, intact skin, apply a thin layer to the nail and surrounding skin, wrap it, and leave it for five to seven days. Record comfort, residue, any tint on nail, skin or bandage, and any irritation. Stop at the first sign of irritation.
Send part of the sample to a laboratory
Commission a salicylic acid assay, a pH reading and a microbiological count. These three tell you whether the product matches its specification and is clean.
Check the pack against your channel
Compare jar, closure and carton with what your channel expects, for example tamper evidence for pharmacy or carton strength for marketplace fulfilment, and list what your private label version must change.
Choose the programme and request a proof sample
Decide between stock packaging, private label and full OEM, then brief us for a proof sample made to your specification. Stability and preservative challenge testing belong at this stage, in your final pack.
Notes on the steps that need them
Run the full wrap cycle
A dab on the back of the hand tells you little about this product, because it is not used like a hand cream. The leaflet has it applied to the nail and the skin around it, then kept under tape or a breathable bandage for five to seven days. Run that full cycle. It is the only way to see residue, comfort under the wrap and whether the garden balsam extract leaves a tint. The Impatiens balsamina dossier explains where a tint would come from.
Use an adult volunteer with healthy, intact skin and no known sensitivity to salicylates, and stop at the first sign of irritation. You are evaluating a cosmetic’s usability, not its effect on a condition.
Three laboratory tests to commission
- Salicylic acid assay by HPLC. The formula runs at 1.6–2.0% against an EU and UK ceiling of 2.0%, so this is the number that matters most. Our salicylic acid guide explains why.
- Microbiological count. Total aerobic count, yeasts and moulds, and absence of the specified organisms, judged against the limits in ISO 17516.
- pH. A low-cost reading to compare against later batches.
Add heavy metals if your retailer or market asks for them. Stability and preservative challenge testing belong to the proof sample in your final pack, not to our stock jar.
From sample to order: the numbers
| Stage | Minimum | Lead time |
|---|---|---|
| Stock unit for evaluation | 1 unit | 7 working days, stock packaging |
| Proof sample to your specification | Per brief | 15 working days |
| Private label run | 500 units | Confirmed with artwork |
| Full OEM run | 2,000 units | 30 working days |
The full supply terms, including pricing drivers, are on the MOQ, lead time and pricing page.
Common questions
Can I order one unit?
Yes. The minimum for our stock packaging is one unit, our jar and carton with no artwork change. It exists so that a buyer can evaluate the product before committing to a branded run.
What can one unit not tell me?
Batch-to-batch consistency, and how the product behaves in your own packaging. For consistency, ask for the certificate of analysis of each batch and, if it matters to you, buy a second unit later from a different batch. For packaging, stability and challenge tests are run on the proof sample in your final pack.
Which laboratory tests matter most at the sample stage?
Salicylic acid assay, because the formula sits at the top of the EU 2.0% limit; a microbiological count against ISO 17516 limits; and pH. Add heavy metals if your market or channel asks for them.
Should I test it on someone with a nail problem?
No. At this stage you are evaluating texture, residue, staining, comfort and skin tolerance, which you can judge on healthy nails. Testing on people with a medical condition is a clinical study, and it carries obligations a sample evaluation does not.
How long does a proof sample take after I decide?
Fifteen working days to produce a proof sample to your specification.
Start with one jar
Tell us where to ship and whether you want the batch certificate and ingredient breakdown with it. One unit is enough to run every check on this page except stability.
More sourcing guides
Sources and where to check
- ISO 17516 — Cosmetics — Microbiology — Microbiological limits
- ISO 11930 — Cosmetics — Microbiology — Evaluation of the antimicrobial protection of a cosmetic product
- Product instruction leaflet — the wrap routine and safety notes
Sourcing this product for your brand?
We are the factory. The pages below cover manufacturing terms rather than consumer advice — minimum quantities, customisation, formulation and distribution.
Looking for a herbal toenail fungus cream?
Our herbal nail care formula is available for sample orders, wholesale supply, OEM packaging and distributor cooperation. Contact us to get started.