Standard Active Last Updated: Feb 09, 2021
ASTM F2326-04(2021)

Standard Test Method for Collection and Analysis of Visible Emissions from Candles as They Burn

Significance and Use

5.1 The intent of this test method is to aid the candle manufacturer to optimize candle formulations in the reduction of visible smoke emissions.

5.2 This test method is intended to provide candle manufacturers a standard procedure to use during development of candle designs and formulations to compare relative smoke/burn behavior. For the development of this method, a protocol was established for trimming the wick on specially prepared test candles to 6 mm to 7 mm (1/4 in.) prior to each burn cycle. It is recommended that the manufacturer determine a standardized protocol, that is, either not trimming the wick or trimming the wick to an appropriate length in order for direct comparison of results.

5.3 A relative ranking of candle formulations can be established with the use of a histogram of the data and control charts.

5.4 This test method is not intended to set forth pass/fail criteria for visible smoke emissions from candles, as such, this method sets no standard level for visible smoke emissions.


1.1 This test method covers the collection and analysis of visible emissions from indoor use candles as they burn.

1.2 The test is to be used to compare relative smoke/burn behavior during development of candle designs and formulations.

1.3 This test method may not be suitable for multiple wick candles; tapers and candles intended to be burned while floating on water commonly known as “floaters.”

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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Book of Standards Volume: 15.11
Developed by Subcommittee: F15.45
Pages: 5
DOI: 10.1520/F2326-04R21
ICS Code: 13.040.40