ASTM E2049-20

Standard Guide for Quantitative Attribute Evaluation of Fragrance/Odors for Hair-care Products by Trained Assessors

SIGNIFICANCE AND USE
6.1 This guide can be used to quantitatively assess the intensity of specific attributes of hair odors resulting from hair-care products.  
6.2 This guide may be utilized for product development, research guidance, and quality control.  
6.3 These are suggested procedures and are not meant to exclude alternate procedures that may effectively provide the same or similar results.
SCOPE
1.1 This guide covers standardized procedures for the quantitative sensory assessment of fragrance/odor intensity or attribute intensity of fragrances in hair-care products through all stages of use (point of purchase, lather, in use, wet hair after rinse, and dry hair) under laboratory conditions with trained assessors.  
1.2 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.  
1.3 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.

General Information

• Status: Published
• Publication Date: 31-Oct-2020
• ICS: 71.100.70 - Cosmetics. Toiletries
• Technical Committee: E18 - Sensory Evaluation
• Drafting Committee: E18.07 - Personal Care and Household Evaluation

Standards Content (Sample)

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.
Designation: E2049 − 20
Standard Guide for
Quantitative Attribute Evaluation of Fragrance/Odors for
1
Hair-care Products by Trained Assessors
This standard is issued under the fixed designation E2049; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
3
1. Scope 2.2 Code of Federal Regulations:
21 CFR 50.25 Protection of Human Subjects—Elements of
1.1 This guide covers standardized procedures for the quan-
Informed Consent
titative sensory assessment of fragrance/odor intensity or
attribute intensity of fragrances in hair-care products through
3. Terminology
all stages of use (point of purchase, lather, in use, wet hair after
3.1 Definitions:
rinse, and dry hair) under laboratory conditions with trained
3.1.1 assessor, n—a general term for any individual re-
assessors.
sponding to a stimuli in a sensory test; in some cases, the
1.2 This standard does not purport to address all of the
trained assessor may be a “cosmetologist” (a licensed, trained
safety concerns, if any, associated with its use. It is the
professional who has been certified by state or government
responsibility of the user of this standard to establish appro-
agencies to apply hair-care products to human heads); these
priate safety, health, and environmental practices and deter-
individuals may be alternatively described as beauticians,
mine the applicability of regulatory limitations prior to use.
stylists, or hairdressers.
1.3 This international standard was developed in accor-
3.1.2 hair swatches, n—sample tresses of human hair that
dance with internationally recognized principles on standard-
serve as sample carriers.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom- 3.1.3 subject, n—an individual recruited to participate in a
study to serve as a sample carrier, and to use, consume, or
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee. experiencethetestsample.Thesampleevaluationiscompleted
by an assessor.
2. Referenced Documents
4. Equipment
2
2.1 ASTM Standards:
4.1 The following equipment may be used during the
E253 Terminology Relating to Sensory Evaluation of Mate-
preparation or evaluation processes, or both:
rials and Products
4.1.1 Hair Swatches, prepared as described in 12.2,
E1207 Guide for Sensory Evaluation of Axillary Deodor-
4.1.2 Aluminum Foil Sheets,
ancy
4.1.3 Beakers, 1000 mL,
E1593 GuideforAssessingtheEfficacyofAirCareProducts
4.1.4 Blow Dryer, specifications should be documented (for
in Reducing the Perception of Indoor Malodor
example, wattage, voltage power level, air velocity,
E2082 Guide for Descriptive Analysis of Shampoo Perfor-
temperature),
mance
4.1.5 Combs,
4.1.6 Glass or Plastic Bottles, 120 mL,
1
This guide is under the jurisdiction of ASTM Committee E18 on Sensory
4.1.7 Pipets,
Evaluationand is the direct responsibility of Subcommittee E18.07 on Personal Care
4.1.8 Scale,
and Household Evaluation.
4.1.9 Towels, cloth or paper, or both,
Current edition approved Nov. 1, 2020. Published December 2020. Originally
approved in 1999. Last previous edition approved in 2012 as E2049 – 12. DOI: 4.1.10 Unfragranced Shampoo Base or Detergent,
10.1520/E2049-20.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Available from U.S. Government Printing Office, Superintendent of
Standards volume information, refer to the standard’s Document Summary page on Documents, 732 N. Capitol St., NW, Washington, DC 20401-0001, http://
the ASTM website. www.access.gpo.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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E2049 − 20
4.1.11 Vinyl or Plastic Gloves, and 7.5 A medical history should be recorded and kept on file
4.1.12 Water (temperature and hardness should be consis- for each participant. For each test, all subjects and assessors
tent). should be asked if their medical history has changed since they
last participated in a hair-care product evaluation. The medical
5. Summary of Guide history should be updated as needed when there is a change in
the physical condition or medication history of a returning
5.1 This guide provides a methodology for the
subject or assessor. This medical information should be treated
identification, selectio
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: E2049 − 12 E2049 − 20
Standard Guide for
Quantitative Attribute Evaluation of Fragrance/Odors for
Shampoos and Hair Conditioners Hair-care Products by
1
Trained Assessors
This standard is issued under the fixed designation E2049; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This guide covers standardized procedures for the quantitative sensory assessment of fragrance/odor intensity or attribute
intensity of fragrances in shampoo or hair conditioner base hair-care products through all stages of use (point of purchase, lather,
in use, wet hair after rinse, and dry hair) under laboratory conditions with trained assessors.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.2 This standard addresses the use of hair products and the equipment needed to use these products. 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 safety, health, and healthenvironmental practices and determine the applicability of regulatory
limitations prior to use.
1.3 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.
2. Referenced Documents
2
2.1 ASTM Standards:
E253 Terminology Relating to Sensory Evaluation of Materials and Products
E1207 Guide for Sensory Evaluation of Axillary Deodorancy
E1593 Guide for Assessing the Efficacy of Air Care Products in Reducing the Perception of Indoor Malodor
E2082 Guide for Descriptive Analysis of Shampoo Performance
3
2.2 Code of Federal Regulations:
21 CFR 50.25 Protection of Human Subjects—Elements of Informed Consent
3. Terminology
3.1 Definitions:
1
This guide is under the jurisdiction of ASTM Committee E18 on Sensory Evaluationand is the direct responsibility of Subcommittee E18.07 on Personal Care and
Household Evaluation.
Current edition approved Oct. 15, 2012Nov. 1, 2020. Published November 2012December 2020. Originally approved in 1999. Last previous edition approved in 20062012
as E2049 – 06.E2049 – 12. DOI: 10.1520/E2049-12.10.1520/E2049-20.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from U.S. Government Printing Office, Superintendent of Documents, 732 N. Capitol St., NW, Washington, DC 20401-0001, http://www.access.gpo.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E2049 − 20
3.1.1 assessor, n—a general term for any individual responding to a stimuli in a sensory test.test; in some cases, the trained
assessor may be a “cosmetologist” (a licensed, trained professional who has been certified by state or government agencies to apply
hair-care products to human heads); these individuals may be alternatively described as beauticians, stylists, or hairdressers.
3.1.2 hair swatches, n—sample tresses of human hair that serve as sample carriers.
3.1.3 subject, n—an individual recruited to participate in a study to serve as a sample carrier, and to use, consume, or experience
the test sample. The sample evaluation is completed by an assessor.
3.1.3 hair swatches, n—sample tresses of human hair that serve as sample carriers.
4. Equipment
4.1 The following equipment may be used during the preparation or evaluation processes, or both:
4.1.1 Hair Swatches, prepared as described in 12.2,
4.1.2 Aluminum Foil Sheets,
4.1.3 Beakers, 1000 mL,
4.1.4 Blow Dryer, specifications should be documented (for example, wattage, voltage power level, air velocity, temperature),
4.1.5 Combs,
4.1.6 Glass or Plastic Bottles, 4 oz (120 mL),120 mL,
4.1.7 Pipets,
4.1.8 Scale,
4.1.9 Towels, cloth or paper,
...