ISO 1887:2014

Textile glass - Determination of combustible-matter content

ISO 1887:2014 specifies a method for the determination of the combustible-matter content of products made from textile glass, such as continuous-filament yarns, staple-fibre yarns, rovings, chopped strands, milled fibres, fabrics, chopped-strand and continuous-filament mats, and other glass reinforcements.

Verre textile — Détermination de la teneur en matières combustibles

General Information

• Status: Published
• Publication Date: 26-Aug-2014
• ICS: 59.100.10 - Textile glass materials
• Technical Committee: ISO/TC 61/SC 13 - Composites and reinforcement fibres
• Drafting Committee: ISO/TC 61/SC 13/WG 1 - Reinforcements and reinforcement products
• Current Stage: 9093 - International Standard confirmed
• Start Date: 04-Dec-2025
• Completion Date: 13-Dec-2025

Relations

• Consolidated By: ISO 20347:2021 - Personal protective equipment - Occupational footwear
• Effective Date: 06-Jun-2022
• Revises: ISO 1887:1995 - Textile glass - Determination of combustible-matter content
• Effective Date: 12-Feb-2011

Overview

ISO 1887:2014 - Textile glass - Determination of combustible‑matter content specifies a laboratory method to quantify the combustible‑matter content (e.g., organic size or finish) of products made from textile glass. The method applies to continuous‑filament yarns, staple‑fibre yarns, rovings, chopped strands, milled fibres, fabrics, mats and other glass reinforcements. Results are expressed as a percentage of the dried product mass removed by calcination.

Keywords: ISO 1887:2014, textile glass testing, combustible matter, calcination, muffle furnace, drying oven, glass reinforcements.

Key technical topics and requirements

• Principle: Weigh dried specimens, calcine in a muffle furnace, and calculate the mass loss (combustible‑matter content) as a percentage of the dried specimen.
• Temperature conditions:
  • Typical calcination: 625 °C ± 20 °C.
  • For temperature‑sensitive glass types: 500–600 °C, by agreement.
  • Drying oven: 105 °C ± 5 °C (lower temperature by agreement for volatile components).
• Apparatus: air‑circulation drying oven, muffle furnace (±20 °C control), desiccator, specimen holder (porcelain crucible or stainless‑steel gauze basket), tongs, balance accurate to 0.1 mg, cutting tools and templates.
• Specimen selection & mass:
  • Yarn lengths vary with linear density (tex).
  • Chopped strands/milled fibres: ≥ 5 g (preferably 15–30 g).
  • Fabrics/mats: specimens of area ≈ 0.1 m² or pieces giving ≥ 5 g.
  • Number of specimens defined (e.g., 3 fabric/mat specimens per metre of width).
• Procedure: stabilize holder mass, dry specimens to constant mass, calcine with initial open‑door burn (to vent volatiles), continue heating, cool in desiccator, and repeat until constant mass is achieved.
• Expression of results: combustible‑matter content H = (mass_loss / dried_mass) × 100; report to two decimal places.
• Precision: inter‑laboratory precision not yet available; a precision statement is to be added in a subsequent revision.

Practical applications and users

ISO 1887:2014 is used by:

• Quality control and materials testing laboratories for textile glass and glass‑reinforced products.
• Manufacturers and suppliers of glass fibre yarns, fabrics and mats to verify size/finish content.
• Composite fabricators and converters who require consistent surface treatments for resin compatibility.
• R&D teams assessing cleaning, sizing, or finishing processes.
• Regulatory bodies and purchasers requiring standardized test data for specifications and acceptance.

Related standards and context

• Prepared by ISO/TC 61/SC 13 (Composites and reinforcement fibres).
• This edition revises and replaces ISO 1887:1995. Future revisions will include inter‑laboratory precision data.

For procurement, conformity checks and process control of glass textile finishes, ISO 1887:2014 provides a repeatable, standardized calcination test method.

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 1887
Fourth edition
2014-09-01
Textile glass — Determination of
combustible-matter content
Verre textile — Détermination de la teneur en matières combustibles
Reference number
©
ISO 2014
© ISO 2014
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Published in Switzerland
ii © ISO 2014 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Terms and definitions . 1
3 Principle . 1
4 Apparatus . 1
5 Test specimens. 2
5.1 Selection of test specimens . 2
5.2 Number of test specimens . 3
6 Procedure. 3
6.1 Precautions to be taken during test . 3
6.2 Weighing the specimen holder . 3
6.3 Weighing the dried test specimen plus holder . 4
6.4 Weighing the calcinated test specimen plus holder . 4
7 Expression of results . 5
8 Precision . 5
9 Test report . 5
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 61, Plastics, Subcommittee SC 13, Composites
and reinforcement fibres.
This fourth edition cancels and replaces the third edition (ISO 1887:1995), which has been technically
revised.
iv © ISO 2014 – All rights reserved

INTERNATIONAL STANDARD ISO 1887:2014(E)
Textile glass — Determination of combustible-matter
content
1 Scope
This International Standard specifies a method for the determination of the combustible-matter content
of products made from textile glass, such as continuous-filament yarns, staple-fibre yarns, rovings,
chopped strands, milled fibres, fabrics, chopped-strand and continuous-filament mats, and other glass
reinforcements.
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1
combustible-matter content
ratio of the mass of material removed on calcination from a dried textile glass product to the mass of the
dried product
Note 1 to entry: This ratio is expressed as a percentage in this International Standard. It is equal to the content
of size or finish on the textile glass product when the size or finish is completely combustible without significant
residue (i.e. primarily organic products).
3 Principle
Test specimens, dried under prescribed conditions, are weighed before and after calcination at
a temperature of 625 °C ± 20 °C or, with types of glass which are unstable at this temperature, at a
temperature between 500 °C and 600 °C, also kept constant to within 20 °C.
4 Apparatus
4.1 Air-circulation oven, for drying specimens, capable of being maintained at 105 °C ± 5 °C or the
chosen drying temperature and maintained to within ±5 °C (see 6.3).
4.2 Muffle furnace, capable of being maintained, with a tolerance of ±20 °C, at any desired temperature
up to 625 °C, the temperature being measured at the centre of the muffle furnace with the door closed.
4.3 Desiccator, containing a suitable desiccant, for example silica gel, calcium chloride, phosphorous(V)
oxide.
4.4 Specimen holder, made from a material stable at the test temperature, allowing the best possible
air circulation around the test specimen and designed to prevent loss of material. The holder may be a
porcelain crucible, a basket made of stainless-steel gauze, etc.
4.5 Stainless-steel tongs, for handling test specimens and holders.
4.6 Balance, accurate to 0,1 mg.
4.7 Polished-metal templates, for the preparation of test specimens.
4.8 Suitable cutting tool, for cutting mat or fabric, for example a knife, scissors, or a cutting disc.
4.9 Suitable wrap-reel, for taking yarn and roving test specimens.
5 Test specimens
5.1 Selection of test specimens
Unless stated to the contrary in the product specification or by the person requesting
...

DRAFT INTERNATIONAL STANDARD ISO/DIS 1887
ISO/TC 61/SC 13 Secretariat: JISC
Voting begins on Voting terminates on

2011-04-29 2011-09-29
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION  •  МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ  •  ORGANISATION INTERNATIONALE DE NORMALISATION

Textile glass — Determination of combustible-matter content
Verre textile — Détermination de la teneur en matières combustibles
[Revision of third edition (ISO 1887:1995)]
ICS 59.100.10
In accordance with the provisions of Council Resolution 15/1993 this document is circulated in
the English language only.
Conformément aux dispositions de la Résolution du Conseil 15/1993, ce document est
distribué en version anglaise seulement.

To expedite distribution, this document is circulated as received from the committee
secretariat. ISO Central Secretariat work of editing and text composition will be undertaken at
publication stage.
Pour accélérer la distribution, le présent document est distribué tel qu'il est parvenu du
secrétariat du comité. Le travail de rédaction et de composition de texte sera effectué au
Secrétariat central de l'ISO au stade de publication.

THIS DOCUMENT IS A DRAFT CIRCULATED FOR COMMENT AND APPROVAL. IT IS THEREFORE SUBJECT TO CHANGE AND MAY NOT BE
REFERRED TO AS AN INTERNATIONAL STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS BEING ACCEPTABLE FOR INDUSTRIAL, TECHNOLOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT, WITH THEIR COMMENTS, NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPORTING DOCUMENTATION.
©  International Organization for Standardization, 2011

ISO/DIS 1887
Copyright notice
This ISO document is a Draft International Standard and is copyright-protected by ISO. Except as permitted
under the applicable laws of the user’s country, neither this ISO draft nor any extract from it may be
reproduced, stored in a retrieval system or transmitted in any form or by any means, electronic,
photocopying, recording or otherwise, without prior written permission being secured.
Requests for permission to reproduce should be addressed to either ISO at the address below or ISO’s
member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Reproduction may be subject to royalty payments or a licensing agreement.
Violators may be prosecuted.
ii © ISO 2011 – All rights reserved

ISO/DIS 1887
&Rntents Page
Foreword . iv
1 Scope . 1
2 Terms and definitions . 1
3 Principle . 1
4 Apparatus . 1
5 Test specimens . 2
5.1 Selection of test specimens . 2
5.2 Number of test specimens. 3
6 Procedure . 3
6.1 Precautions to be taken during test . 3
6.2 Weighing the specimen holder . 3
6.3 Weighing the dried test specimen plus holder . 4
6.4 Weighing the calcinated test specimen plus holder . 4
7 Expression of results . 4
8 Precision . 5
9 Test report . 5

ISO/DIS 1887
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 1887 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 13, Composites and
reinforce ment fibres.
This forth edition cancels and replaces the thard edition (ISO 1887:1995), of which has been technically
revised.
iv © ISO 2011 – All rights reserved

DRAFT INTERNATIONAL STANDARD ISO/DIS 1887

Textile glass — Determination of combustible-matter content
1 Scope
This International Standard specifies a method for the determination of the combustible-matter content of
products made from textile glass, such as continuous-filament yarns, staple-fibre yarns, rovings, chopped
Strands, milled fibres, fabrics, chopped-Strand and continuous-filament mats and other glass reinforcements.
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
2.1
combustible-matter content
The ratio of the mass of material removed on calcination from a dried textile glass product to the mass of the
dried product.
NOTE This ratio is expressed as a percentage in this International Standard. It is equal to the content of size or finish
on the textile glass product when the size or finish is completely combustible without significant residue (i.e. primarily
organic products).
3 Principle
Test specimens, dried under prescribed conditions, are weighed before and after calcination at a temperature
of 625 °C ± 20 °C or, with types of glass which are unstable at this temperature, at a temperature between
500 °C and 600 °C , also kept constant to within 20 °C.
4 Apparatus
4.1 Air-circulation oven, for drying specimens, capable of being maintained at 105 °C + 5 °C or the
chosen drying temperature ± 5 °C (see 6.3).
4.2 Muffle furnace, capable of being maintained, with a tolerante of ± 20 °C, at any desired temperature up
to 625 °C, the temperature being measured at the centre of the muffle furnace with the door closed.
4.3 Desiccator, containing a suitable desiccant, for example silica gel, Calcium chloride, phosphorous(V)
Oxide.
4.4 Specimen holder, made from a material stable at the test temperature, allowing the best possible air
circulation around the test specimen and designed to prevent loss of material. The holder may be a porcelain
crucible, a basket made of stainless-steel gauze, etc.
4.5 Stainless-steel tongs, for handling test specimens and holders.
4.6 Balance, accurate to 0,l mg.
4.7 Polished-metal templates, for the preparation of test specimens.
ISO/DIS 1887
4.8 Suitable cutting too
...