GB/T 43446-2023Hair products—Testing method for drapability (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.

Introduction

The issuing organization of this document draws attention to the fact that when stating compliance with this document, it may refer to Chapters 4, 5, 7, 8 and Chapter 9 Patents related to "Hair product sag measurement method", "Hair product sag tester" and "Hair product flexibility and sag tester" use.

The issuing authority of this document takes no position regarding the authenticity, validity, or scope of the patents.

The patent holder has undertaken to the issuing authority of this document that he is willing to negotiate with any applicant on reasonable and non-discriminatory terms and conditions.

Next, negotiate for patent licensing. A statement of the patent holder has been filed with the issuing authority of this document.

Please note that in addition to the above patents, some content in this document may still involve patents. The publisher of this document assumes no responsibility for identifying patents responsibility.

1 Scope

This document describes a test method for determining the sag of hair products using the side projection method.

This document applies to straight hair products with a length of not less than 170mm.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document.

GB/T 6529 Standard atmosphere for humidity conditioning and testing of textiles

GB/T 8170 Numerical rounding rules and expression and determination of limit values

GB/T 23166 Hair product terminology

3 Terms and definitions

The terms and definitions defined in GB/T 23166 and the following apply to this document.

4 Principles

Using the sag coefficient as the sag index, the sample is arranged into a hair bundle with neat ends, a certain length, and a certain quality. One end of the sample is held Hold it, and the other end hangs down naturally. While the sample is being disturbed by rotation, use a digital camera to measure the maximum position of a certain position on the edge of the side image of the sample.

Large spacing and minimum spacing, calculate the ratio of the product of the maximum spacing and the minimum spacing before the hair bundle is disturbed by rotation to obtain the sag coefficient.

5 Test conditions

The atmosphere including humidity control and testing should be implemented in accordance with the provisions of GB/T 6529.

6 Instruments and Equipment