introduction
ISO (International Organization for Standardization) is a global alliance of national standards bodies (ISO member bodies). The development of international standards is usually carried out through ISO technical committees. Each member institution interested in a subject on which a technical committee has been established has the right to be represented on that committee. International governmental and non-governmental organizations liaising with ISO are also involved in this work. ISO works closely with the International Electrotechnical Commission (IEC) on all matters of electrical standardization.

The procedures used to develop this document and those used for further maintenance are described in Part 1 of the ISO/IEC Directive. In particular, attention should be paid to the different approval criteria required for different types of ISO documents. This document has been drafted in accordance with the editing rules of ISO/IEC Directive Part 2 (see iso.org/directives).

Please note that certain elements of this document may be subject to patent rights. ISO is not responsible for identifying any or all such patents. Details of any patent rights identified during the preparation of the document will be found in the introduction and/or in the list of patent claims received by ISO (see iso.org/patents).

Any trade names used in this document are provided for the convenience of the user and do not constitute an endorsement.

ISO 12625-1-2019 “Tissue paper and tissue paper products – Part 1 Vocabulary”

Voluntary, related standards and conformity assessment related ISO specific and express the meaning of terminology as well as in relevant ISO technical barriers to trade (TBT) adhere to the principle of the world trade organization (WTO) information, please refer to the following URL:iso.org/iso/foreword.html.

This document has been prepared by the Technical Committee of the European Committee for Standardisation (CEN) CEN/TC 172 (Pulp, paper and board) in collaboration with the Technical Committee ISO/TC 6 (Paper, board and pulp) and Sub-Committee SC 2 (Test methods and quality specifications for paper and board). Compliance with ISO and CEN Technical Cooperation Agreement (Vienna Agreement).

The third edition cancels and replaces the technically revised second edition (ISO 12625-1:2011). The main changes from the previous edition are as follows:

– Change the number of terms to those directly related to the organization;

– The alphabetical index was reorganized due to the merging and addition of “term groups”;

– Edit updates.

A list of all parts in the ISO 12625 series can be found on the ISO website.

Any feedback or questions regarding this document should be directed to the user’s national standards body. A complete list of these institutions can be found at iso.org/members.html.

ISO 12625-1-2019 “Tissue paper and tissue paper products – Part 1 Vocabulary”

introduce
This document defines definitive terms for the physical properties of tissue paper manufactured using wrinkling or non-wrinkling techniques and includes products made using a combination of these tissue paper manufacturing processes.

Tissue products are an important and growing market for single-use disposable hygiene products and industrial products. The current range of familiar products includes toilet paper, facial tissues, kitchen/household towels, hand towels, napkins, MATS, industrial wipes, other absorbent tissues, and toner treatment products.

Tissue paper manufacturing technology has evolved and deviated from “normal” paper technology, so it is necessary to develop a new vocabulary.

The purpose of this document is to allow tissue manufacturers, tissue processors and tissue customers to agree on various tissue manufacturing terms and to facilitate the harmonization of test methods. Each of the listed terms is briefly defined and illustrated if found useful. In writing this document, English was chosen as the original language. Then it is said that some expressions cannot be translated into another language. For these cases, English expressions are used.

ISO 12625-1-2019 “Tissue paper and tissue paper products – Part 1 Vocabulary”

1 Range
This document establishes general principles for the use of terminology in the entire field of work for tissue and tissue products.

It allows the use of generic terms in industry and business.

It is specified that ISO 15755 is suitable for the detection of impurities and dents in tissue paper and tissue products.

ISO 287 applies to the determination of moisture content in tissue and household paper products.

2 Normative references
There is no normative reference in this document.

3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

3.1 Water Absorption

The ability of tissue paper (3.58) and/or tissue products (3.59) to absorb liquids

3.2 Absorption

3.2.1 Absorption capacity

ISO 12625-1-2019 “Tissue paper and tissue paper products – Part 1 Vocabulary”

The amount of liquid absorbed per unit mass of the sample under test

Note 1: Water absorption capacity is defined in ISO 12625-8.

3.2.2 Absorption rate

The mass of the liquid absorbed by the sample per unit time is determined by dividing the total mass of the liquid absorbed in a given period of time by the duration of that period

3.2.3 Absorption time

The time required for the sample to be fully wetted

[Source: ISO 12625-8:2010, 3.1]

ISO 12625-1-2019 “Tissue paper and tissue paper products – Part 1 Vocabulary”

3.3 Accelerated Aging

A procedure that can quickly predict changes in the characteristics of tissue paper (3.58) or tissue products (3.59) that occur over a longer period of time under normal conditions

Note 1 This is especially true for wet strength tissue paper or tissue paper products whose wet resistance increases over time. An accelerated aging procedure for determining wet strength is specified in ISO 12625-5.

3.4 Apparent packing density

The mass of tissue paper (3.58) or tissue paper product (3.59) per unit volume, calculated from its gram weight (3.28) and expansion thickness (3.10)

Note 1: It is determined by dividing the gram weight of tissue paper or tissue product by the thickness determined on the tissue.

[Source: ISO 12625-3:2014, 3.4]

3.5 Paper Towel products for going out

ISO 12625-1-2019 “Tissue paper and tissue paper products – Part 1 Vocabulary”

AFH Tissue products

Tissue products for Institutional and industrial markets (3.59)

Example: Tissue products used in hospitals, restaurants, hotels, offices.

3.6 Base Paper

A single layer of tissue paper produced as a semi-finished product and intended to be converted into a finished product

3.7 Substrate forming

Wet-formed coils between one or two continuous wires or between one wire and felt produce endless sheets of paper with a gram weight (3.28), usually between 10 g/m2 and 50 g/m2

3.8 Brightness

3.8.1D65 brightness

The intrinsic irradiance (reflectance) factor measured using a reflector with the characteristics described in ISO 2469, equipped with a filter or corresponding function with an effective wavelength of 457nm and a half-peak bandwidth of 44nm, and adjusted so that the UV content of the irradiation incident on the sample under test corresponds to the UV content of the CIE standard light source D65

[Source: ISO 2470-2:2008, 3.4, modified – the symbols R457, D65 and note 1 of the entry were deleted.

3.8.2C brightness

ISO brightness

The inherent diffuse radiation (reflectance) factor measured using a reflectormeter with the characteristics described in ISO 2469, equipped with a filter with an effective wavelength of 457nm and a half-bandwidth of 44nm or the corresponding function, and adjusted so that the UV content of the irradiation incident on the sample under test corresponds to the UV content of the CIE light source C

ISO 12625-1-2019 “Tissue paper and tissue paper products – Part 1 Vocabulary”

[Source: ISO 2470-1:2016, 3.4, modified – Added the preferred term “C brightness” and deleted the entry’s symbol R457 and note 1.

3.9 Bulk

Reciprocal of apparent packing density (3.4)

3.10 Expansion thickness

The thickness of a single sheet of tissue paper (3.58) or tissue paper product (3.59), calculated from the thickness of several sheets of superimposed paper, measured under an applied static load

[Source: ISO 12625-3:2014, 3.3]

3.11 Calender

Mechanical treatment of the substrate passed in the clamp area between two smooth cylinders with the aim of improving the smoothness or surface softness of tissue paper (3.58) or tissue paper (3.59) (3.52.2)

Note 1: This operation is performed by calender. In addition, the process allows some control over the thickness of the tissue paper or tissue paper product.

3.12 Cellulose filler

A corrugated web or sheet of open structure, made of cellulose fibers (mainly chemical pulp) and consisting of one or more layers of lightweight paper

Note 1: Open formation is obtained when paper is produced with low base weight and high drawing (usually more than 35%).

ISO 12625-1-2019 “Tissue paper and tissue paper products – Part 1 Vocabulary”

Note 2: Soft crepe paper of very low gram weight, usually used in bundles or MATS containing several sheets of paper.

[Source: ISO 4046-4:2016, 4.37, modified – (mainly chemical pulp) added, entry note 1 and entry note 2]

3.13 Cloth-like touch

The properties of tissue paper (3.58) or tissue products (3.59) give it a similar feel to woven fabric materials

3.14 Color

3.14.1 International laboratory color space

The three-dimensional approximate uniform color space is generated by drawing the rectangular coordinates L*, a*, and b

Note 1: The quantity L* is a measure of the brightness of the test piece, where L* = 0 corresponds to black and L* = 100 is defined by a good reflection diffuser. Visually, the quantities a* and b* represent the red-green and yellow-blue axes in the color space, respectively, such that

– +a* is a measure of the redness of the test piece,

– −a* is a measure of the greenness of the test component.

ISO 12625-1-2019 “Tissue paper and tissue paper products – Part 1 Vocabulary”

– +b* is a measure of the degree of yellowing of the test piece, and

– −b* is a measure of the blueness of the test component.

If both a* and b* are equal to zero, the specimen is gray.

[Source: ISO 5631-3:2015, 3.6, modified – entry note 1 added]

3.14.2CIELAB Color (D65/10°)

The L*, a* and b* values of the sample were evaluated according to the CIELAB 1976 system, according to the CIE 1964 (10°) standard colorimetric viewer and the CIE standard light source D65

Note 1: See ISO 12625-7 for more information.

[Source: ISO/TR 10688:2015, 2.5.2, Modified – Delete preferred term “(L*, a*, b*)”, preferred term CIELAB color (D65/10°), and add entry Note 1]

3.14.3CIELAB color (C/2°)

ISO 12625-1-2019 “Tissue paper and tissue paper products – Part 1 Vocabulary”

The L*, a* and b* values of the sample are evaluated according to the CIELAB 1976 system, according to the CIE 1931 (2°) standard colorimetric viewer and CIE light source C

Note 1: See ISO 12625-15 for more information.

[Source: ISO/TR 10688:2015, 2.5.1, Modified – Delete preferred term “(L*, a*, b*)”, preferred term CIELAB color (C/2°) and Note 1]

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