In China ,the inspection of glass candle holders is mainly provided by SGS.
Content include:

Construction Qualities Test Part : Workmanship Review

Burning Performance Test Part :Abnormalities ,End of Useful Life ,Container Temperature During Burning , Flammability ,Stability ,Flammability Of Candlesticks and Candles ,Specification for Annealed Soda-Lime Silicate Glass Candle Containers (Applicable For Glass Container Only ).

All the test items can show that the surface finishing of the glass candle holder, accessories and the quality of the glass container are qualified, and can also explain the use range of the glass candle holder when it is in use.
Whether it is a retailer or an importer, the instruction manual can be made according to the test report.

QingDao Yuan Bridge Houseware Co,. Ltd