ISO 105-Z07-1995 PDF

Full title and description

ISO 105‑Z07:1995 — Textiles — Tests for colour fastness — Part Z07: Determination of application solubility and solution stability of water‑soluble dyes. Specifies a laboratory method to determine how readily water‑soluble dyes dissolve under application conditions and how stable their solutions remain over time (temperature range typically 40 °C to 90 °C).

Abstract

Describes a practical test procedure for assessing the application solubility of water‑soluble dyes and the stability of the resulting dye solutions. The method is intended to indicate behaviour under application conditions rather than to measure absolute thermodynamic solubility; it includes sample preparation, test temperatures and observation of solution clarity and residue.

General information

• Status: Published (International Standard; confirmed on review cycles and maintained as current at time of last ISO review).
• Publication date: June 1995 (1995‑06).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 59.080.01 (Textiles — tests for colour fastness).
• Edition / version: Edition 1 (1995).
• Number of pages: 4 (concise procedure document).

Scope

Specifies a laboratory method for determining the application solubility of water‑soluble dyes in the temperature range approximately 40 °C to 90 °C and for assessing the stability of their aqueous solutions under those conditions. The procedure is intended to indicate suitability for dyeing/printing applications and to reveal tendencies for precipitation or instability during use; it does not provide absolute solubility values.

Key topics and requirements

• Definition of application solubility and solution stability for water‑soluble dyes.
• Specified temperature range for testing (about 40 °C to 90 °C) and recommended heating/control methods.
• Sample preparation and concentration guidelines for preparing test solutions.
• Observation criteria for clarity, filter residue, precipitation and changes during holding periods.
• Reporting requirements: test temperature, concentration, time, observations and any residues or turbidity.
• Notes on factors affecting results (e.g., formulation additives, pH, ionic strength) and interpretative cautions.

Typical use and users

Used by dye and chemical manufacturers, textile formulators, quality‑control and analytical laboratories, R&D groups developing dye formulations and finishing houses that need to verify dye behaviour under application conditions. Also used by standards committees and certification bodies when assessing product consistency and suitability for specified dyeing/printing processes.

Related standards

Part of the ISO 105 series (colour fastness tests) and referenced alongside other Z‑parts that address dye dispersibility, solubility and related application tests. This part has been adopted identically in some national/regional publications (for example EN/DIN adoptions under the EN ISO 105 series). Users should consult other ISO 105 parts for complementary test methods and national identical adoptions for regional implementation details.

Keywords

ISO 105, colour fastness, water‑soluble dyes, application solubility, solution stability, textile dyes, dye testing, temperature stability, quality control.

FAQ

Q: What is this standard?

A: ISO 105‑Z07:1995 is an ISO test method that specifies how to determine the application solubility and solution stability of water‑soluble dyes under practical dyeing/printing conditions.

Q: What does it cover?

A: It covers preparation of dye solutions, test temperatures (roughly 40 °C to 90 °C), observation of solution clarity and residue, and reporting of results. It is intended to indicate behaviour during application rather than to measure absolute solubility.

Q: Who typically uses it?

A: Dye manufacturers, textile chemical formulators, textile testing laboratories, R&D and quality control teams in the textiles and printing industries, and standards bodies. The method helps these users assess whether a dye or formulation is suitable for specified application conditions.

Q: Is it current or superseded?

A: The 1995 edition remains the published International Standard; it has undergone periodic review and was confirmed in ISO systematic reviews (most recently confirmed on review cycles reported by ISO). Users should check the ISO catalogue for any future amendments or revisions.

Q: Is it part of a series?

A: Yes — it is one part (Z07) of the ISO 105 series of standards dealing with tests for colour fastness; other parts of ISO 105 cover different test methods and dye classes.

Q: What are the key keywords?

A: Water‑soluble dyes, solubility, solution stability, colour fastness testing, textile dyes, ISO 105, dye application testing.