ISO 7681:2024
(Main)Natural rubber field latex — Determination of dry rubber content
Natural rubber field latex — Determination of dry rubber content
This document specifies a method for the determination of the dry rubber content of natural rubber field latex. The method is not suitable for latices from natural sources other than Hevea brasiliensis, or for compounded latex, vulcanized latex or artificial dispersions of rubber.
Latex de plantation de caoutchouc naturel — Détermination de la teneur en caoutchouc sec
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ISO 7681
First edition
Natural rubber field latex —
2024-03
Determination of dry rubber content
Latex de plantation de caoutchouc naturel — Détermination de
la teneur en caoutchouc sec
Reference number
ISO 7681:2024(en) © ISO 2024
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ISO 7681:2024(en)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2024
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
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Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
© ISO 2024 – All rights reserved
ii
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ISO 7681:2024(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 1
6 Reagent . 2
7 Procedure . 2
7.1 General .2
7.2 Method A: Sheeting by hand .2
7.3 Method B: Mechanical sheeting .3
8 Expression of results . 3
9 Precision . 3
10 Test report . 3
Annex A (informative) Precision data . 5
Bibliography . 7
© ISO 2024 – All rights reserved
iii
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ISO 7681:2024(en)
Foreword
ISO (the International Organization for Standardization) is a wo
...
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 7681
ISO/TC 45/SC 3
Natural rubber field latex —
Secretariat: AFNOR
Determination of dry rubber content
Voting begins on:
2023-12-19
Latex de plantation de caoutchouc naturel — Détermination de la
teneur en caoutchouc sec
Voting terminates on:
2024-02-13
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 SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 7681:2023(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. © ISO 2023
---------------------- Page: 1 ----------------------
ISO/FDIS 7681:2023(E)
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 7681
ISO/TC 45/SC 3
Natural rubber field latex —
Secretariat: AFNOR
Determination of dry rubber content
Voting begins on:
Latex de plantation de caoutchouc naturel — Détermination de la
teneur en caoutchouc sec
Voting terminates on:
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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.
RECIPIENTS OF THIS DRAFT ARE INVITED TO
ISO copyright office
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
CP 401 • Ch. de Blandonnet 8
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
CH-1214 Vernier, Geneva
DOCUMENTATION.
Phone: +41 22 749 01 11
IN ADDITION TO THEIR EVALUATION AS
Reference number
Email: copyright@iso.org
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO
ISO/FDIS 7681:2023(E)
Website: www.iso.org
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
Published in Switzerland
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN
DARDS TO WHICH REFERENCE MAY BE MADE IN
ii
© ISO 2023 – All rights reserved
NATIONAL REGULATIONS. © ISO 2023
---------------------- Page: 2 ----------------------
ISO/FDIS 7681:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 1
6 Reagent . 2
7 Procedure .2
7.1 General . 2
7.2 Method A: Sheeting by hand . 2
7.3 Method B: Mechanical sheeting . 3
8 Expression of results .
...
ISO/FDIS 7681:2023(E)
ISO TC 45/SC 3/WG 2
Date: 2023-11-28
Secretariat: AFNOR
Natural rubber field latex — Determination of dry rubber content
Latex de plantation de caoutchouc naturel — Détermination de la teneur en caoutchouc sec
First edition
Date: 2023-12-05
---------------------- Page: 1 ----------------------
ISO/FDIS 7681:2023(E)
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland.
ii © ISO 2023 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/FDIS 7681:2023(E)
Contents
Foreword . 4
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Apparatus . 2
6 Reagent . 2
7 Procedure . 2
7.1 General . 2
7.2 Method A: Sheeting by hand . 2
7.3 Method B: Mechanical sheeting . 3
8 Expression of results . 3
9 Precision . 3
10 Test report . 4
Annex A (informative) Precision data . 5
Bibliography . 7
© ISO 2023 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO/FDIS 7681:2023(E)
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 documentsdocument 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of
(a) patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed
patent rights in respect thereof. As
...
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