Name: EN ISO 105-Z10:1999 — Textiles - Tests for colour fastness - Part Z10: Determination of relative colour strength of dyes in solution (ISO 105-Z10:1997)
SKU: EN ISO 105-Z10:1999
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EN ISO 105-Z10:1999 PDF

Textiles - Tests for colour fastness - Part Z10: Determination of relative colour strength of dyes in solution (ISO 105-Z10:1997)

Название (английский):

EN ISO 105-Z10:1999

Textiles - Tests for colour fastness - Part Z10: Determination of relative colour strength of dyes in solution (ISO 105-Z10:1997)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 11
Дата публикации:: 19 мая 1999 г.
Издание:: CEN EN 105 edition 1 version 1
ICS:: 59.080.01

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Описание (английский):

La présente partie de l'ISO 105 est utilisée pour déterminer, par spectrophotométrie d'absorption sur des solutions colorantes, l'intensité de la couleur d'un colorant par rapport à celle d'un colorant de référence.NOTE 1: Parmi les conditions fondamentales de cette méthode, les solutions colorantes ne doivent pas disperser la lumière et doivent respecter la loi de Boug her-Lambert-Beer, et les solutions échantillons et de référence doivent avoir des courbes d'absorption identiques ou similaires dans le domaine du rayonnement visible du spectre.NOTE 2: Des courbes d'absorption similaires ou identiques s'obtiennent généralement si les essais sont réalisés dans un but de contrôle de production de lots ou livraisons d'un même colorant. La méthode n'est pas applicable à l'évaluation de colorants ayant des courbes d'absorption très différentes.NOTE 3: L'intensité de la couleur d'un colorant n'est pas une constante physique car elle dépend, entre autres, du milieu et de la méthode d'essai. L'intensité de couleur déterminée par la présente méthode peut donc différer de celle que donneraient d'autres déterminations, par exemple une évaluation instrumentale ou visuelle de teintures.

Overview

EN ISO 105‑Z10:1999 (identical to ISO 105‑Z10:1997) specifies a spectrophotometric method for determining the relative colour strength of dyes in solution. The method compares a dye under test to a designated reference dye by measuring solution absorbance and calculating a percentage colour‑strength value. It is intended primarily for dye production control and batch/delivery quality checks where solutions obey the Beer–Lambert law and show similar absorption curves in the visible spectrum.

Key topics and requirements

Measurement principle: Spectrophotometric absorbance (A = e c d) and Beer's law; relative colour strength Fs = (e2 / e1) × 100, where e is the specific extinction coefficient. Equivalent forms using absorbance or concentration are given.
Preconditions: Solutions must not scatter light and should have identical or similar absorption curves in the visible region; otherwise the method is not applicable.
Apparatus: Volumetric flasks (ISO 1042), pipettes (ISO 648), cuvettes/flow cells (typically 5 mm or 10 mm path length), analytical balance, spectrophotometer or filter colorimeter.
Solvents and additives: Water (demineralized) for water‑soluble dyes; methanol, ethanol, acetone, N‑methylpyrrolidone, cellosolve, or solvent mixtures for insoluble dyes. Additives allowed for pH adjustment, chelation, de‑agglomeration (surfactants), dispersing agents and antioxidants.
Sample handling and preparation: Store samples sealed; weigh ≥0.5 g (to 0.0005 g); dissolve/disperse, equilibrate to 20–25 °C, dilute so maximum absorption corresponds to 10–60% transmittance.
Typical concentrations: For commercial dyes, ~10–100 mg/L for a 10 mm cell (proportionally adjusted for other path lengths).
Precision: Repeatability coefficient of variation ≈ 0.2–0.5% (single‑lab); expect at least double the uncertainty between different labs.
Reporting: Include reference to ISO 105‑Z10, sample and reference dye IDs, and the relative colour strength. Full reports may also list solvent, concentration, cell path length, wavelength, instrument, dilution factor and date.

Applications

Quality control for dye manufacturers and suppliers (batch/delivery verification)
Production control in textile mills to monitor dye lot consistency
Analytical laboratories performing dye characterization
R&D when screening dyes with comparable spectral behaviour
Pre‑validation step before applying dyes to substrates (to be checked against application methods)

Limitations and practical notes

Not a universal physical constant-colour strength depends on medium and method; validate solution results by comparison with application (dyeing) methods.
Avoid use when absorption curves differ markedly (shade differences); in such cases weighted total extinction or application methods may correlate better with visual assessment.
Observe safety precautions for organic solvents and light‑sensitive solutions.

Related standards

ISO 648 - Laboratory glassware: one‑mark pipettes
ISO 1042 - Laboratory glassware: one‑mark volumetric flasks
ISO 105 family - broader colour fastness test methods (see ISO 105‑A01 for a parts list)

Keywords: EN ISO 105‑Z10:1999, ISO 105‑Z10, relative colour strength, colour strength, spectrophotometric measurement, dyes in solution, textile colour fastness, Beer's law, dye quality control.

EN ISO 105-Z10:1999 PDF

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Abstract

Overview

Key topics and requirements

Applications

Limitations and practical notes

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