How to Evaluate a Custom Fragrance Manufacturer Before Signing the Contract

A custom fragrance manufacturer should be approved only after its legal identity, factory controls, formula rights, product documents, testing, packaging, traceability, capacity, costs, and defect responsibilities have been checked. A good sample and a low quotation are not enough. Ask for recent batch records, product-specific reports, a controlled reference sample, a factory audit, and a pilot run made with the intended formula and packaging.

Use separate agreements for confidentiality, product development, tooling, pilot production, and long-term supply. Do not commit to a large order until the product specification, test plan, ownership terms, delivery schedule, and remedies for failed goods are written clearly.

The numerical ranges in this guide are practical starting points, not fixed rules for every perfume project. Final limits should be confirmed with the selected formula, pump, bottle, production line, target market, and expected product life.

Set the Scope

Prepare one written product brief before asking manufacturers for quotations. Send the same brief to every candidate so prices and services can be compared on the same basis.

The brief should include:

• Product type, such as parfum, eau de parfum, body mist, hair mist, perfume oil, solid perfume, or room spray
• Where and how the product will be used
• Target fragrance concentration or performance
• Fill size and first-order quantity
• Expected annual volume
• Target markets
• Bottle, pump, gasket, cap, label, carton, and shipping case requirements
• Fragrance direction and target customer
• Ingredient restrictions and planned claims
• Required tests and documents
• Launch date
• Formula, artwork, and tooling ownership
• Packaging, export, and shipping responsibilities

Define the product category carefully. A skin perfume, hair mist, room spray, and fabric spray may use similar packaging, but they do not always follow the same laws or testing requirements. A household product should not be treated as a cosmetic simply because the cosmetic route appears easier.

Clarify what “custom” includes. It may cover only a new scent, a scent in a stock bottle, or a complete project with formula, bottle, pump, decoration, carton, production, and regulatory support.

XUELEI provides integrated fragrance OEM and ODM manufacturing services covering fragrance development, packaging, manufacturing, quality control, and project support. Even under a one-stop service model, the contract should identify who is responsible for each part of the project.

List all planned claims, such as “natural,” “organic,” “hypoallergenic,” “clean,” “alcohol-free,” or “long-lasting.” These claims should be checked against the formula, available evidence, intended use, and target-market rules.

Use one quotation sheet for all candidates. At minimum, compare the fragrance concentration, fill size, bottle weight, pump model, decoration process, carton material, tooling cost, testing cost, documentation, payment terms, lead time, and excess packaging quantity.

Check the Company

Confirm the legal company before paying a large deposit.

Request and compare:

• Business registration
• Legal company name
• Registered address
• Factory address
• Exporting company
• Bank account name
• Contract-signing company
• Production site
• Related companies involved in the project

The company names on the licence, quotation, invoice, bank account, GMP certificate, test reports, and contract should match or have a clear written connection.

A sales company may take payment while another company manufactures the product. A fragrance house may make the concentrate while a separate factory fills the perfume. Such arrangements can work, but the buyer must know which company controls each stage and which company accepts responsibility.

Check important information independently:

• Search the company in the relevant official business registry.
• Confirm that the factory address is a real production site.
• Verify certificates with the certification body where possible.
• Check the certificate scope, site, activities, and expiry date.
• Ask for product-liability insurance details.
• Confirm that the insurance covers the product and target market.
• Request evidence of recent projects using a similar product format.

A factory that mainly fills shampoo may not be ready to handle high-alcohol perfume, flammable-material storage, chilled filtration, crimp pumps, decorative glass, or dangerous-goods shipping.

Ask for at least two recent customer references when practical. Do not ask only whether the customer was satisfied. Ask whether the first batch matched the sample, whether any material was changed without approval, whether the shipment was late, and how leakage or odor differences were handled.

Review at least three recent batches of a similar product during the audit. One good batch does not prove stable production.

XUELEI's company history and manufacturing background can be reviewed separately from its service pages. Apply the same approach to every supplier: history shows experience, while current records show present control.

Map the Chain

Ask the manufacturer to show the full material and information flow.

The map should identify who handles:

• Fragrance creation
• Fragrance concentrate production
• Alcohol, water, and additive sourcing
• Bulk blending
• Maturation and filtration
• Bottle and decoration production
• Pump, gasket, dip tube, and cap production
• Filling and crimping
• Labeling and carton packing
• Finished-product testing and release
• Export documents and dangerous-goods preparation
• Freight booking

Mark every outsourced step. The manufacturing contract should require the main supplier to remain responsible for subcontractors it selects.

Identify single-source materials. A project may depend on one custom bottle, one fragrance concentrate, or one pump gasket. Ask whether a tested replacement exists. A replacement that fits the bottle is not automatically compatible with the perfume.

The information flow is also important. A safety assessor may need the full quantitative formula even when the fragrance house does not disclose it to the brand. State who holds the formula, who sends it to the assessor, and what documents the brand will receive.

Record who owns excess fragrance concentrate, bottles, pumps, labels, cartons, molds, and printing plates. Branded materials should not be sold, transferred, recycled, or destroyed without written approval.

For every critical component, record at least one approved supplier and one backup plan. If no second source exists, record the expected replacement lead time and the tests that must be repeated after a change.

Audit GMP

ISO 22716 provides cosmetic GMP guidance for production, control, storage, and shipment. It does not replace separate rules for worker safety, fire control, environmental protection, or hazardous materials.^[1]

Check the following details on a GMP or ISO 22716 certificate:

• Legal company name
• Manufacturing address
• Activities covered
• Issue and expiry dates
• Certification body
• Excluded sites or processes

A certificate does not prove that daily production is controlled. Review recent records, including:

• Raw-material receiving and release records
• Batch manufacturing records
• Cleaning records
• Scale and instrument calibration
• Filling and packaging checks
• Finished-product release records
• Deviation and corrective-action reports
• Complaint investigations
• Mock recall reports

Ask to see the latest three similar batches rather than records selected only for the audit. Good records show actual values, dates, operator identity, review, correction history, and action after a failed result.

During the audit, follow one raw material from receipt to the finished batch. Materials should be clearly marked as quarantined, approved, rejected, returned, or expired.

Check line clearance before filling. Bottles, caps, labels, cartons, and batch codes from the previous order must be removed.

For a new line setup, a practical starting check is 10 filled units before normal production continues. Fill quantity, crimp, spray, code, label position, and appearance should all be checked. During production, these items may be checked again every 30 to 60 minutes, depending on line speed, batch size, and defect risk.

Odor carryover also requires control. Ask how tanks, hoses, filters, pumps, and filling heads are cleaned after strong fragrances. Production order, cleaning checks, filter changes, and first-unit inspection can reduce cross-contamination.

A useful corrective-action report should show the affected batch, immediate control, root cause, permanent fix, person responsible, completion date, and proof that the problem did not return.

The XUELEI perfume manufacturing process explains how formulation, testing, blending, maturation, filtration, filling, and release connect. These stages should be checked during a factory audit.

Check Regulations

Ask for a country-specific responsibility table. “Internationally compliant” is not enough.

For the United States, confirm who handles facility registration, product listing, safety records, label review, adverse-event reports, and recall support.

Facilities covered by MoCRA generally renew registration every two years. The responsible person generally lists marketed cosmetic products and updates the listing annually. FDA also states that registration and listing do not equal product approval.^[2]

The U.S. responsible person is the manufacturer, packer, or distributor whose name appears on the label. It is not automatically the overseas factory. Serious adverse events must be reported to FDA within 15 business days.^[3]

The responsible person must keep records that support adequate product safety. FDA does not set one fixed testing program for every cosmetic, so the evidence should match the formula, use, and known risks.^[4]

For the European Union, confirm the EU Responsible Person, Cosmetic Product Safety Report, Product Information File, CPNP notification, label review, claims evidence, and serious undesirable-effect process.

The Product Information File generally must be kept for 10 years after the last batch is placed on the market. It includes the product description, safety report, manufacturing method, GMP statement, and claims evidence where needed.^[5]

For EU fragrance-allergen labeling, listed allergens generally require individual declaration above 0.001% in leave-on products and 0.01% in rinse-off products. Products covered by the transition and placed on the Union market by 31 July 2026 may continue to be made available until 31 July 2028, subject to the regulation's conditions.^[6]

Great Britain and Northern Ireland should be checked separately. Products sold in Great Britain need a UK-established Responsible Person and notification through the SCPN service.^[7]

Products placed on the Northern Ireland market use the CPNP route through a Responsible Person established in Northern Ireland or the EEA.^[8]

For Canada, manufacturers and importers generally submit a Cosmetic Notification Form within 10 days after first sale.^[9]

Canada's 24 specified fragrance allergens became subject to the updated disclosure rules on 12 April 2026. The expanded list of 81 allergens applies to new cosmetics from 1 August 2026 and existing cosmetics from 1 August 2028. The relevant thresholds are above 0.001% for leave-on products and above 0.01% for rinse-off products.^[10]

For every target country, name the importer or responsible party, notification owner, safety-file owner, label approver, claims reviewer, complaint contact, and record-retention owner.

Review the Documents

Request documents for the exact fragrance code, formula version, concentration, intended use, and target market.

• Certificate of Conformity to the IFRA Standards
• Fragrance-allergen declaration
• Safety Data Sheet
• Fragrance specification
• Batch Certificate of Analysis
• Ingredient or INCI information
• Restricted-substance declaration
• Natural-origin or vegan statements where claimed
• Alcohol and water specifications
• Finished-product specification
• Stability and packaging compatibility reports

IFRA does not issue Certificates of Conformity. The document is prepared for a fragrance mixture by a company familiar with the IFRA Standards. It does not replace a safety assessment or local law.^[11]

Check the fragrance code, formula revision, product category, maximum permitted level, actual dosage, issue date, issuer, and IFRA standards basis.

A fragrance approved at a maximum level of 12% for the relevant category cannot support a finished product using 20% without further assessment or reformulation.

Calculate allergens in the finished product. If the concentrate contains 0.50% of one allergen and is added at 15%, the finished product contains 0.075% of that allergen before other sources are included.

A batch COA should show the lot number and actual results where quantitative tests are used. A document that only repeats specification limits may be a conformity statement rather than an analytical report.

Create one document register showing the file name, product code, formula version, market, issue date, issuer, and replacement date. Update the full set after a formula change.

Define Ownership

“Custom fragrance” does not automatically give the buyer ownership of every formula and process.

Separate the following items:

• Olfactive brief
• Fragrance concentrate formula
• Finished-product formula
• Manufacturing process
• Fragrance code
• Product specifications
• Packaging drawings
• Molds and tooling
• Artwork and product name
• Later formula changes

Define the countries, product categories, sales channels, term, minimum purchases, treatment of similar scents, rights after termination, and ownership of later changes.

A usable formula transfer may need ingredient percentages, material grades, approved suppliers, mixing order, temperatures, times, maturation, filtration, and quality limits. An ingredient list alone may not allow another factory to reproduce the product.

The contract should also cover discontinued materials, reformulation costs, repeated testing, ownership of the new version, and supply interruption.

XUELEI's custom perfume manufacturing capabilities include fragrance development, design, packaging, and production. Each output should still have a named owner in the contract.

Control Samples

Every sample should have a code, date, formula version, fragrance level, base, bottle version, pump version, and packaging version. Do not approve a sample named only “Final” or “Latest.”

Use the terms correctly:

• Golden sample: the approved product reference
• Retained sample: a sample kept from a commercial batch
• Stability sample: a sample stored under planned test conditions

A small laboratory sample may not behave exactly like a production batch after large-scale mixing, maturation, filtration, transfer, and filling.

The approved sample should use the intended fragrance concentrate, alcohol, additives, bottle, pump, gasket, decoration, and label.

Keep one sealed golden sample at the factory, one with the brand, and at least one unopened backup where the project risk justifies it.

Compare samples under the same conditions. Use the same container, spray count, temperature, and resting time. Evaluate the opening, middle, and dry-down.

Use at least two evaluators when practical. Three evaluators provide a better check for important launches. Record the result as “no noticeable difference,” “noticeable but acceptable,” or “unacceptable.”

For a spray comparison, use the same number of sprays on the same type of blotter and compare at fixed times, such as immediately after spraying, after 30 minutes, and after 4 hours. The exact times may be changed to match the fragrance style.

Keep an unopened backup of the golden sample and record storage conditions. Heat, light, repeated opening, and alcohol evaporation can change a reference sample.

Set Specifications

Create one controlled finished-product specification before production.

For each requirement, state the method, unit, sample size, inspection frequency, equipment, approver, and action after failure.

“Good color,” “premium finish,” or “matches sample” are too vague. Use drawings, photographs, physical limit samples, or measured ranges.

At line start, a practical first check is 10 units. During production, net content and crimp may be checked every 30 to 60 minutes. For a long run or a high-risk package, increase the sample size or inspection frequency.

Include production controls such as actual ingredient weights, mixing time, maturation dates, filtration records, fill checks, crimp checks, line clearance, and component reconciliation.

AQL sampling can support normal appearance inspection, but serious issues such as wrong product, contamination, broken glass, missing legal information, and major leakage need stricter controls.

The XUELEI fragrance concentration guide explains why the actual fragrance percentage should be written in the specification instead of relying only on terms such as EDP or EDT.

Test the Liquid

The liquid test plan should state the formula version, fragrance lot, sample quantity, storage conditions, duration, review dates, methods, limits, laboratory, and approver.

Check:

• Odor change
• Color change
• Haze, sediment, crystals, or separation
• Density change
• Oxidation
• Microbiological risk where relevant

Test both bulk liquid and filled product. Bulk testing helps separate formula problems from packaging interaction.

Use normal storage and suitable accelerated conditions. Accelerated testing may find problems earlier, but it does not automatically prove an exact shelf life.

For a new project, use several review points rather than checking only at the end. A practical plan may include the start, 2 weeks, 4 weeks, 8 weeks, and later points where needed. The final schedule should match the product risk and launch timing.

Odor checks should look for lost top notes, rancid, metallic, plastic, solvent-like, sulfurous, or oxidized odors.

Natural materials may vary because of origin, harvest, storage, and oxidation. Synthetic materials may improve repeatability but are not automatically cheaper, safer, or longer-lasting. XUELEI explains these differences in its guide to natural and synthetic fragrance materials.

Water-based or low-alcohol products may need microbial limits, preservation review, or challenge testing. Consider water activity, pH, botanical materials, filling conditions, packaging, and consumer use.

Every failed sample should have a written investigation. Do not replace it with a new sample without recording the cause and corrective action.

Test the Pack

Packaging compatibility must use the final liquid and final product-contact materials.

Check the bottle, pump, gasket, dip tube, collar, cap, coating, print, adhesive, label, carton, and shipping case.

• Leakage
• Pump loosening or blockage
• Gasket swelling
• Dip-tube softening
• Plastic cracking or metal corrosion
• Coating, print, or label damage
• Weak, uneven, or dripping spray
• Excessive evaporation
• Cap-fit changes

Test suitable units upright, on their side, and inverted. A practical first leak check may use at least 10 units in each required position for 24 hours. Longer tests may be needed for temperature cycling, storage, or transport validation.

Measure priming strokes, average output per spray, variation between units, spray pattern, dripping, blockage, leakage, and performance after repeated use.

For many fine-fragrance pumps, an initial project range of 0.08 to 0.12 mL per actuation may be used for discussion. The final range must be confirmed with the selected pump, fragrance formula, bottle, and expected user experience.

A pump that needs more than three to five strokes to begin spraying may feel inconvenient to the consumer. This range should be confirmed during development rather than treated as a fixed industry limit.

A short spray check cannot prove pump life. Depending on the product size and expected use, a project may test 500 to 1,000 actuations on selected units. The test should also record dripping, weak spray, blockage, loosening, and leakage.

Test decorated bottles after direct contact with the perfume. Alcohol and fragrance materials may damage paint, foil, ink, adhesive, frosted coatings, and soft-touch finishes.

Repeat the relevant tests after changes to the formula, alcohol, gasket, dip tube, pump spring, bottle coating, adhesive, label, or decoration.

Alcohol-based perfume may be regulated as dangerous goods. The correct shipping name depends on the product's main function. PHMSA states that UN1266 “Perfumery products” should not be used for unrelated flammable cosmetics or cleaners.^[12]

Air shipments should be checked against the current dangerous-goods rules and carrier requirements for each shipment.^[13]

The XUELEI fragrance OEM quality-control guide covers liquid, bottle, pump, packaging, and batch controls in more detail.

Trace Each Batch

Test backward and forward traceability.

Starting from one finished batch, the factory should find:

• Formula version
• Fragrance, alcohol, water, and additive lots
• Bottle, pump, gasket, cap, label, and carton lots
• Operators and equipment
• Cleaning and production records
• Test results and release approval
• Shipment destinations
• Retained-sample location

Then select one raw-material or packaging lot and identify every finished batch that used it.

A two- to four-hour mock-recall target is a practical starting point for many projects, but it is a buyer-set target rather than a universal legal rule. Record the actual time taken and every missing item.

Reconcile materials issued with finished units, samples, rejects, rework, waste, and remaining stock. Large unexplained differences require investigation.

Major changes to the formula, site, supplier, pump, gasket, coating, or process should require written approval and defined retesting.

Check Capacity

Review capacity for the actual formula and packaging, not the factory's total annual output.

• Minimum and maximum batch size
• Filling speed for the selected bottle
• Number of suitable lines
• Current and peak utilization
• Changeover and cleaning time
• Maturation and filtration time
• Quality-release time
• Packaging lead time
• Backup equipment and trained staff

A line rated at 60 bottles per minute has a theoretical eight-hour output of 28,800 bottles. Actual saleable output will be lower after setup, inspection, cleaning, jams, changeovers, component shortages, and packing are included.

For example, if the line runs effectively for 6 hours instead of 8 and achieves 85% usable output during that time, the result would be about 18,360 saleable units rather than 28,800. This is only an illustration; actual output should come from recent factory records.

Ask for recent results from at least three similar orders, including good units per shift, reject rate, rework, downtime, planned completion date, and actual completion date.

Capacity is controlled by the slowest step. Filling may be fast while filtration, cap fitting, label inspection, carton packing, or final release delays the order.

The schedule should show formula approval, testing, artwork, packaging production, incoming inspection, blending, maturation, filtration, filling, packing, release, freight booking, and shipment.

Break Down Costs

Request separate prices for development, concentrate, alcohol, bottle, pump, cap, decoration, label, carton, filling, testing, regulatory support, tooling, inspection, storage, freight, and dangerous-goods preparation.

Compare total project cost, including:

• Sample and revision fees
• Stability and compatibility testing
• Safety assessment and product notification
• Molds and printing plates
• Third-party audit and inspection
• Excess packaging inventory
• Storage and disposal
• Freight surcharges and insurance
• Rework, sorting, replacement, and retesting

Packaging minimums may be higher than the finished-product MOQ. For example, a project may order 5,000 finished units while the pump supplier requires 10,000 pumps. The remaining 5,000 pumps still create cost, storage, ownership, and future compatibility questions.

State who pays for and owns excess materials, where they are stored, how long they are kept, and what happens after termination.

Link payments to clear stages such as approved formula, approved packaging, passed pilot, completed production, passed inspection, and released shipping documents.

Write the Contract

Use technical annexes with the commercial agreement.

The contract should cover:

• Legal parties and approved production site
• Approved subcontractors
• Formula and golden-sample codes
• Product and packaging specifications
• Test and release requirements
• Formula, artwork, tooling, and exclusivity rights
• Change control
• Audit and inspection rights
• Delivery and quantity tolerance
• Payment and warranty terms
• Sorting, rework, replacement, refund, and recall rules
• Insurance and record retention
• Termination and formula-transfer duties
• Governing law and dispute process

Use separate agreements where needed:

• Confidentiality agreement
• Development agreement
• Tooling or packaging agreement
• Pilot purchase order
• Long-term manufacturing agreement

Define when inspection starts, which documents must be supplied, whether shipment needs written release, how hidden defects are handled, and which laboratory resolves conflicting results.

State who pays for added inspection, sorting, rework, storage, replacement freight, duty, destruction, customer credits, and recall costs.

Recall terms should name the parties responsible for authority contact, customer communication, record supply, returned goods, investigation, and corrective action.

A qualified lawyer should review the legal agreement. The technical and quality teams should separately approve the specifications, test plan, and annexes.

Run a Pilot

A pilot should use commercial ingredients, final product-contact packaging, the intended production line, normal staff, normal records, and normal inspection methods.

A few manually filled laboratory bottles are not a production trial.

The pilot should be large enough to show normal variation during mixing, filtration, filling, crimping, labeling, packing, and inspection. For a small packaging-focused trial, 300 to 1,000 finished units may provide useful line data, but the correct quantity depends on the normal batch size and equipment.

Take at least 10 samples from the beginning, 10 from the middle, and 10 from the end of the run when practical. Check odor, color, net content, crimp, spray, code, label, and appearance.

The pilot report should record:

• Quantity started and completed
• First-pass quantity
• Reworked and rejected quantities
• Main defects
• Deviations
• Corrective actions
• Responsible person and completion date
• Proof that the correction worked

Repeat the pilot or affected tests after a major change to the fragrance concentration, gasket, pump, bottle coating, alcohol source, production site, or process.

XUELEI's guide to choosing a private label perfume factory provides further checks for pilot production and supplier evidence.

Score Suppliers

Use a weighted scorecard. Adjust the weights for the product.

Score the evidence from 0 to 5:

• 0: no control or refusal
• 1: verbal promise only
• 2: general document not matched to the product
• 3: product-related documents and basic records
• 4: recent records supported by an audit or pilot
• 5: consistent evidence across more than one batch

Use three results: approve, approve after corrective action, or reject. A total score should not override a critical failure. False certificates, hidden production, missing traceability, or deliberate substitution should lead to rejection even when other scores are high.

Red Flags

Stop the project when the supplier provides false certificates, hides the production site, changes materials without approval, cannot trace the formula or packaging, refuses to define formula ownership, or has unsafe production and storage.

Other warning signs include:

• Documents for a different fragrance code
• Full payment requested before technical approval
• Testing removed to meet a launch date
• Prices far below comparable quotations without a clear reason
• No cost or ownership plan for excess packaging
• Claims that every product is compliant in every country
• Claims that all materials are interchangeable
• No written response to leakage or batch inconsistency

A reliable factory may have complaints, deviations, and rejected materials. The important test is whether problems are recorded, investigated, corrected, and prevented from returning.

Sign Only After Proof

Approve a long-term fragrance manufacturer only after the final formula, packaging, documents, tests, costs, and responsibilities are fixed in writing. Check at least three similar batch records, obtain two customer references where possible, keep controlled golden samples, and test the pump, leakage, spray output, traceability, and pilot run under normal production conditions. A two- to four-hour mock recall, 10-unit line-start check, 30- to 60-minute in-process inspection, and 500- to 1,000-actuation pump test are useful starting points, but every value must be adjusted to the actual product. Reject any supplier with false documents, hidden production, unapproved substitutions, or missing batch traceability.

Brands preparing a fragrance project can review the XUELEI OEM/ODM service process or submit the product type, target market, quantity, fragrance direction, and packaging requirements through the XUELEI contact page.