ISO 12625-1-2019 Tissue paper and tissue products – Part 1 Vocabulary
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This document has been prepared by the Technical Committee of the European Committee for Standardisation (CEN), CEN/TC 172 (Pulp, paper and board), in cooperation with the Technical Committee ISO/TC 6 (paper, board and pulp) and Subcommittee SC 2 (Test methods and quality specifications for paper and board). Comply with ISO and CEN technical cooperation agreement (Vienna Agreement).
The third edition cancelled and replaced the technically revised second edition (ISO 12625-1:201). 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 by merging and adding “term groups”;
– Edit updates.
A list of all the parts in the ISO 12625 series can be found on the ISO website.
Any feedback or questions about 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.
This document defines defining 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.
Paper towel products are an important and growing market for single-use disposable sanitary 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 lotion treatments.
Tissue paper manufacturing techniques have evolved and deviated from “normal” paper techniques, so there is a need for a new vocabulary.
The purpose of this document is to get household paper manufacturers, tissue processors and tissue customers to agree on various tissue manufacturing terms and to facilitate the harmonization of testing methods. Each of the terms listed is briefly defined and illustrated if found useful. In writing this document, English was chosen as the original language. Then it was said that some expressions cannot be translated into another language. For these cases, English expressions are used.
This document establishes general principles for the use of terminology in the entire field of work for tissue and household paper 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
3.2.1 Absorption capacity
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 during a given period of time by the duration of the period
3.2.3 Absorption Time
The time required for complete wetting of the sample
[Source: ISO 12625-8:201, 3.1]
3.3 Accelerated Aging
A procedure that quickly predicts 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 particularly the case for wet strength tissue paper or tissue products whose wet resistance increases over time. An accelerated aging procedure for determining wet strength is specified in ISO 12625-5.
ISO 12625-1-2019 Tissue paper and tissue products – Part 1 Vocabulary
3.4 Apparent packing density
The mass of tissue paper (3.58) or tissue products (3.59) per unit volume is calculated from its gram weight (3.28) and expanded 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 12625-3:214, 3.4]
3.5 Paper Towel products for outdoor use
AFH Tissue products
Paper towel products for institutional and industrial markets (3.59)
Example: Tissue products used in hospitals, restaurants, hotels, offices.
3.6 Base Paper
A single sheet 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 consecutive 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
The intrinsic radiance (reflectance) factor measured using a reflectoscope with the properties 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 radiation 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 entry symbols R457, D65 and note 1 were deleted.
The inherent diffuse radiation (reflectance) factor measured using a reflectoscope with the properties described in ISO 2469, equipped with a filter or corresponding function with an effective wavelength of 457nm and a half-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 source C
[Source: ISO 2470-1:2016, 3.4, Modified – Added the preferred term “C brightness” and deleted the entry symbol R457 and note 1.
Reciprocal of apparent packing density (3.4)
3.10 Expansion thickness
The thickness of a single sheet of tissue paper (3.58) or of a tissue product (3.59), calculated from the thickness of several sheets of superimposed paper, measured at the static load applied
[Source: ISO 12625-3:2014, 3.3]
Mechanical treatment of a substrate passing through the clamp between two smooth cylinders with the aim of improving the smoothness or surface softness of tissue paper (3.58) or household paper (3.59)
Note 1: This operation is performed by calender. In addition, the process allows some control over the thickness of tissue paper or tissue paper products.
3.12 Cellulose filler
A corrugated mesh 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 at low base weight and high tensile (usually over 35%).
Note 2: Very low gram weight soft crepe paper, usually used in bundles or MATS containing several sheets of paper.
[Source: ISO 4046-4:2016, 4.37, Modified — (mainly chemical pulp) added, entry Notes 1 and entry Notes 2]
3.13 Cloth-like touch
Properties of tissue paper (3.58) or tissue products (3.59) that give it a similar feel to woven cloth materials
3.14.1 International laboratory color space
Three-dimensional approximate uniform color space, by drawing rectangular coordinates L*, a*, b to produce *
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 perfect reflection diffuser. Visually, the quantities a* and b* represent the red and green axes and yellow and blue axes in the color space, respectively, making
— +a* is a measure of the redness of the test piece,
– −a* is a measure of the greenness of the test item.
— +b* is a measure of the degree of yellowing of the test item, and
– −b* is a measure of the blueness of the test component.
If both a* and b* are 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 observer 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°)
The L*, a*, and b* values of the sample were evaluated according to the CIELAB 1976 system, according to the CIE 1931 (2°) standard colorimetric observer 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 terms “(L*, a*, b*)”, preferred terms CIELAB Color (C/2°) and Note 1]
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