How to approve scented candles before production
Approve each vessel, wax, wick and fragrance combination using representative production-intent samples, recorded burn trials and specialist review of heat and flame behaviour. Release bulk production only when concerns are resolved and the tested specification is frozen. Cambridge China Bridge can coordinate samples and factory follow-up through its staff in China.
Define what the approval covers
The existing candle sourcing guide covers the safety framework, fragrance documents and labelling. This guide adds the practical approval gate. For Great Britain, official guidance says consumer products must be safe in normal or reasonably foreseeable use. Ask a candle testing specialist to agree the trial method, acceptance criteria and foreseeable-use assessment before samples are burned.
Create a combination register covering vessel material, shape and finish; wax blend; wick type, supplier, arrangement and fixing; fragrance identity and concentration; dye; and fill specification. Give each combination a sample reference. Record the intended care instructions alongside it so the specialist can assess whether the trial conditions and instructions fit the product.
Select representative samples
Use samples made with the materials, equipment and process intended for bulk production. Ask the factory to record component sources, material batches, filling conditions and curing arrangements. Have samples selected across the trial run rather than letting the factory supply only its best-looking candles. Keep matching unburned samples and photographs for comparison.
Arrange trials for every vessel-wax-wick-fragrance combination. Ask the specialist to set sample quantities and select any additional challenging configurations. Do not assume that a different scent, vessel coating or wick supplier is covered by an earlier result. Use the test report coverage guide to match the report to the ordered specification.
Record behaviour throughout the burn
Have trained staff conduct supervised trials in a suitable testing area under the agreed method, with stop conditions and emergency arrangements. Cover the candle's burn life, including later burns and the end stage, rather than approving from an opening burn. Record burn and cooling periods, wick trimming, ambient conditions, sample identity and any departure from the method.
Record flame height and stability, soot, wick movement, melt-pool development, ignition beyond the wick, vessel damage and effects on the supporting surface. Have the specialist specify temperature measurement locations and suitable equipment. Keep measurements and timed photographs linked to each sample. A comfortable touch or a short video is not enough to judge heat behaviour.
Get specialist review before release
Ask a laboratory or adviser experienced in candle fire safety to review the full records and examine concerning samples. Request a written conclusion identifying the tested combination, method, results, limitations and unresolved issues. An official glass-candle recall identified cuts, fire and burn risks from jars cracking or shattering in use. Treat vessel integrity as part of the review.
Hold approval if the flame becomes unstable, the vessel cracks, heat behaviour is unexplained or results vary unexpectedly between samples. Let the specialist judge the observations against the agreed criteria and decide what further work is needed. Do not invent a universal safe vessel temperature. Agree a corrective change, remake affected samples and repeat the relevant trials before release.
Freeze the specification and control changes
Issue written production approval naming the exact combinations released, specification revision, sample references and supporting reports. Retain an unburned reference sample and the trial records. Resolve open safety concerns before authorising bulk production; record scent and appearance acceptance separately so commercial preferences cannot obscure the specialist's findings.
Require the factory to flag changes to vessels, wax, wicks, fragrance, fixing or filling before using them. Follow the material substitution guide and ask the specialist whether repeat trials are needed. Link subsequent production checks to the approved specification. Cambridge China Bridge's staff in China can follow up sample identity, factory corrections and production consistency.
Frequently asked questions
Does every candle fragrance need a burn trial?
Include each fragrance and concentration in the combination register and trial plan. Do not assume that the same vessel and wick make different scents equivalent.
Can I approve candles from a factory video?
Use video as supporting evidence. Ask for sample identity, full burn records, temperature measurements and specialist conclusions before releasing production.
What vessel temperature is safe for a candle?
Ask the specialist to set measurement points and acceptance criteria for the actual vessel and use conditions. Do not approve it by touch or apply an unsupported universal limit.
What if the factory changes the wick after approval?
Hold release of the changed combination. Record the proposed substitution and ask the specialist what repeat trials are needed before approving the revised specification.