What exactly should be tested before mass production of skin care products?

1. First give a conclusion: what does this question really determine?

Pre-mass production testing is not a one-size-fits-all report, but a combination of evidence determined by formula risks, usage methods, packaging structure and sales market. The safest sequence is to first lock in the representative formula and final packaging materials, then conduct stability, microbiological risk and compatibility observations in parallel, and finally convert the results into specifications, production control and release standards.

This article does not simplify the pre-mass production test map of skin care products: how stability, microorganisms and packaging material compatibility are arranged into a single number or empirical slogan. The project should clearly describe the product definition, target market, sample version, acceptance criteria and responsible person, and then use records to verify each step.

• Dosage form and water content: Waters, lotions, creams, oils and powders have different risks
• Usage methods: wide-mouth jars, droppers, pump bottles, and hoses determine the opportunity for consumers to introduce contamination
• Packaging materials: plastics, glass, elastomers, coatings and seals may interact with the material body
• Target market and shelf life: decide on test method, timing and data format
• First batch size: Pilot batches and large batches must be able to illustrate the representativeness of the process after scale-up

2. Establish a decision matrix: answer these variables first

The project meeting should confirm item by item: 1. Dosage form and water content: liquids, lotions, creams, oils and powders have different risks; 2. Usage methods: wide-mouth jars, droppers, pump bottles, hoses determine the chance of contamination by consumers; 3. Packaging materials: plastics, glass, elastomers, coatings and seals may interact with the material; 4. Target market and shelf life: determine test methods, time points and data formats; 5. The scale of the first batch: pilot batches and large batches must be able to illustrate the representativeness of the process after scale-up. Changes in any of these variables may trigger recalculation of formulas, packaging materials, quotations, tests, labels or delivery dates.

It is recommended that brands divide each variable into four states: "frozen, pending verification, replaceable, and irreplaceable". Unfrozen matters are entered into the risk list, and the decision date and approver are marked to avoid repetition of oral opinions after proofing.

3. Executable process: from requirements to frozen version

The recommended process is: 1. Risk assessment and freeze the formula version, process parameters and candidate packaging materials; 2. Make laboratory samples, pilot samples and final packaging samples, and establish unique numbers; 3. Observe appearance, odor, color, pH, viscosity or other key indicators as planned; 4. Carry out microbiological limits and necessary anti-corrosion effectiveness evaluation; 5. Complete observations related to packaging material sealing, discharging, adsorption migration, drop or transportation; 6. Determine product specifications, sampling, sample retention and release rules based on the results. Each step should have inputs, outputs, completion conditions, and a person responsible for the next step.

The key to the process is not that more forms are better, but that samples, formulas, packaging materials, tests and labels use the same version number. Any sample that cannot be traced back to specific raw materials, processes and packaging should not be directly used as a basis for mass production.

• Risk assessment and freezing of formula versions, process parameters and candidate packaging materials
• Make laboratory samples, pilot samples and final packaging samples, and establish unique numbers
• Observe appearance, odor, color, pH, viscosity or other key indicators as scheduled
• Conduct evaluation of microbial limits and necessary preservative efficacy
• Complete packaging material sealing, discharging, adsorption migration, drop or transportation related observations
• Determine product specifications, sampling, sample retention and release rules based on results

4. Evidence Map: Which documents can support the judgment?

It is recommended to establish an evidence index, which at least includes: 1. Original stability records, photos, instrument data and deviation description; 2. ISO 17516 related microbial limit results or target market corresponding requirements; 3. ISO 11930 anti-corrosion effectiveness or written basis based on low-risk judgment; 4. Final packaging material compatibility, pump volume, sealing and transportation test records; 5. Version correspondence between pilot batch, first production and sample retention plan. The evidence needs to indicate the source, date, version, applicable products, applicable markets and custodian.

Supplier statements, laboratory reports, regulatory texts, and internal records have varying probative powers. When citing data, the conclusion should be limited to its sample, method and scope of application. Raw material data should not be directly extrapolated to all finished product conclusions.

• Original stability records, photos, instrument data and deviation descriptions
• ISO 17516 related microbial limit results or target market corresponding requirements
• ISO 11930 Anti-corrosion effectiveness or documented basis for low risk judgment
• Final packaging material compatibility, pump capacity, sealing and shipping test records
• Version correspondence between pilot batch, first batch production and retention sample plan

5. Cost,MOQ How should it be separated from the cycle?

The quotation and scheduling should at least consider: 1. Multiple version testing of samples and final packaging materials will increase the number of samples; 2. Accelerated, normal and low temperature observation periods are different, and you cannot just report a total number of days; 3. Outsourcing microorganisms and special instrument projects are billed based on the number of samples and time points; 4. A budget should be reserved for formula adjustment, packaging material replacement and retesting after failure; 5.SKU The more , fragrance types and packaging material structures there are, the more important the representative grouping is. The same "unit price" may include different service boundaries and must therefore be compared using the same quantity, quality standards, data requirements and delivery location.

It is recommended to divide the total cost into one-time development fee, unit variable cost, testing compliance fee, residual material loss preparation, logistics warehousing and risk reserve; divide the cycle into demand freezing, proofing, testing, packaging materials, production scheduling, inspection and delivery, and indicate the starting conditions respectively.

• Multiple version testing of samples and final packaging increases sample count
• The observation periods for acceleration, normal temperature and low temperature are different, and you cannot just report a total number of days.
• Outsourced microbiology and special instrument projects are billed based on the number of samples and time points
• A budget should be reserved for formula adjustment, packaging material replacement and retesting after failure.
• SKU The more , fragrance types and packaging material structures there are, the more important the representative grouping is.

6. Quality control: converting from sample indicators to mass production standards

Quality control cannot just say "consistent with the sample". Measurable indicators should be written into specifications, and color, aroma, skin feel and appearance should be managed through standard samples, limit samples, controlled light sources or agreed methods, and first article, inspection, finished product inspection and retention samples should be set up.

Records directly related to this topic include: 1. Test plan and risk basis; 2. Formula, process and packaging material version table; 3. Sample ledger and time point record; 4. Deviation, failure and rectification and retest records; 5. Product specifications, inspection methods and batch release form. Sampling, re-inspection, deviation and release authority must also be clear to ensure that mass production batches can answer "who released when and based on what evidence".

• Test plan and risk basis
• Formula, process and packaging material version table
• Sample ledger and time point record
• Deviation, failure and corrective retest records
• Product specifications, inspection methods and batch release forms

7. Compliance and target market: Don’t regard a report as a global passport

Target market judgment should cover: 1. Chinese marketing materials, efficacy claims and safety assessments should use consistent formula versions; 2. EU PIF and safety assessments require traceable product and packaging information; 3. US cosmetic labeling and safety responsibilities cannot be replaced by a stability report. Regulations, system certification, raw material documentation, product testing and market registration solve different problems respectively and cannot be lumped together.

Brands, responsible entities, factories, raw material suppliers and third-party laboratories have different roles. Factories can provide manufacturing and quality documents, but specific product labeling, claims, and marketing responsibilities still need to be independently verified by sales market.

• Chinese marketing materials, efficacy claims and safety assessments should use consistent formulation versions
• EU PIF and safety assessment require traceable product and packaging information
• US cosmetic labeling and safety responsibilities cannot be replaced by a stability report

8. The most common failure modes and key points to avoid pitfalls

The most common problems in the project review include: 1. Only laboratory beaker samples are tested, and the final bottles are never included in the stability observation; 2. Mistaking the microbial limit qualification for the anti-corrosion system must be effective; 3. Only looking at the appearance, not recording changes in pH, viscosity, pump volume and sealing; 4. Using the old report after changing raw material suppliers or flavors; 5. Discovering that there is no judgment standard after delamination, leakage or odor occurs in bulk goods. These problems are often not that the technology is completely impossible, but that the key conditions are not frozen in advance.

For each high-risk item, six columns are established: probability of occurrence, impact, prevention, monitoring, correction, and responsible person. When deviations occur, isolate the affected batches and versions first, and then investigate the cause to avoid using the next round of samples to cover up the previous round of problems.

• Only laboratory beaker samples were tested, and the final bottles were never included in the stability observation
• Mistakenly believing that the anti-corrosion system must be effective if the microbiological limits are met
• Only look at the appearance and do not record changes in pH, viscosity, pump volume and sealing
• Keep using the old report after changing raw material suppliers or flavors.
• Only after delamination, leakage or odor occurred in the large goods did I realize that there was no judgment standard.

9. What attachments should be included in procurement and contracts?

The contract attachments must at least quote: 1. Test plan and risk basis; 2. Formula, process and packaging material version table; 3. Sample ledger and time point record; 4. Deviation, failure and rectification and retest records; 5. Product specifications, inspection methods and batch release form. When third-party packaging materials, raw materials or testing are involved, brand approval, supplier responsibilities, data delivery, change notifications and post-expiration handling must also be clearly stated.

The delivery terms should define the starting point, brand feedback suspension, supplier extension, retesting, force majeure and release mechanism; the acceptance terms should define the method, sample, objection period, re-inspection and non-conformity disposal.

10. Implementation suggestions for brands

A more reliable implementation method is: 1. Use the risk matrix to decide the project first, and do not use "industry packages" to replace judgment; 2. Write down the sample, method, conditions, time point and acceptance criteria for any test; 3. Continue to keep samples for observation after the first batch of mass production to verify the consistency between the laboratory and production. Turning each suggestion into a person responsible and a date takes the step from reading the guide to project management.

YOU MIRACLE It is recommended that brands complete a one-page project brief before entering samples and quotations. The clearer the information, the more accurately factories can evaluate formulas, packaging materials, testing,MOQ and delivery time; when the information is unclear, the lowest quotation is usually the most difficult to use as the final cost.

• Use the risk matrix to decide on the project first, and don’t use the “industry package” to replace your judgment.
• For any test, clearly state the sample, method, conditions, time points and acceptance criteria.
• After the first batch of mass production, continue to keep samples for observation to verify the consistency between the laboratory and production.