ISO 105-Z04-1995 PDF

Full title and description

ISO 105‑Z04:1995 — Textiles — Tests for colour fastness — Part Z04: Dispersibility of disperse dyes. This International Standard specifies a laboratory method to assess how well disperse dyes remain dispersed in aqueous media by measuring filtration time and the amount of residue retained on a filter; it is intended for evaluation of dye dispersibility under defined test conditions for quality control and comparative testing.

Abstract

Describes a method for the determination of the dispersibility of disperse dyes by means of filtering time and filter residue. The test is limited to assessment in aqueous media and is intended to give comparative information on the degree of dispersion of dye formulations.

General information

• Status: Published (International Standard; confirmed on review and maintained current).
• Publication date: December 1995 (published 1995‑12; commercial records list 14 December 1995 as the publication day).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 59.080.01 (Textiles — general).
• Edition / version: Edition 1 (1995).
• Number of pages: 4 (concise test method document).

Key bibliographic and status details as recorded by ISO and commercial standards distributors.

Scope

This part of ISO 105 specifies a laboratory procedure to determine the dispersibility behaviour of disperse dyes in aqueous media by measuring the time taken for a given dispersion to pass through a specified filter and by evaluating the filter residue. The method is comparative rather than absolute: results are valid only when test conditions (apparatus, filter type, sample preparation, temperature, dispersion medium) are controlled and reproduced. It does not address dye performance on fibre or fastness after dyeing — only the dispersibility of the dye formulation itself.

Key topics and requirements

• Principle: assessment of dye dispersion by filtration time and measurement/inspection of filter residue.
• Sample preparation: preparation of a standardized aqueous dispersion of the disperse dye prior to testing.
• Apparatus and consumables: specified funnel/filter arrangement and defined filter medium to ensure reproducibility.
• Test conditions: controlled volumes, temperatures and timing to enable comparative results.
• Result reporting: filtration time and amount/appearance of filter residue as indicators of dispersibility; observations recorded as specified by the method.
• Limitations: applicable only to disperse dyes in aqueous media; results are comparative and depend strongly on strict adherence to test conditions.

Typical use and users

Used by dye manufacturers, textile chemical formulators, quality control laboratories, textile testing houses and research institutions to evaluate and compare dispersibility of disperse-dye formulations, to screen production batches, and to support product development and troubleshooting where dispersion behaviour affects dyeing uniformity or equipment performance.

Related standards

ISO 105‑Z04 is one part of the ISO 105 family (Tests for colour fastness) and is associated with other Z-parts that address dye characteristics and related laboratory evaluations (for example ISO 105‑Z01, ISO 105‑Z02, ISO 105‑Z03). National/adopted equivalents exist (for example EN/BS/NF/other EN adoptions) and ISO 3696 (water for analytical laboratory use) is commonly referenced where water quality affects test performance.

Keywords

disperse dyes; dispersibility; colour fastness series; textile testing; filtration time; filter residue; dye formulation; quality control; ISO 105; aqueous dispersion.

FAQ

Q: What is this standard?

A: ISO 105‑Z04:1995 is an International Standard that specifies a laboratory method for determining the dispersibility of disperse dyes in aqueous media by measuring filtration time and filter residue.

Q: What does it cover?

A: It covers a comparative test procedure (sample preparation, apparatus, test execution and result reporting) to evaluate how well disperse dye particles remain dispersed in water; it does not address dye fastness on fibres or dyeing performance directly.

Q: Who typically uses it?

A: Dye producers, textile chemical formulators, QC and testing laboratories, and research groups working on dye formulation and process control use this test to screen and compare dispersions.

Q: Is it current or superseded?

A: The 1995 edition remains the published International Standard and the ISO record shows it was reviewed and confirmed (thus maintained current) on review; users should check national adoption notices for any regional amendments before use.

Q: Is it part of a series?

A: Yes — ISO 105 is a multipart series covering a wide range of textile colour-fastness tests; Z04 is one of the Z (dye-characteristics) parts that address dye behaviour and related laboratory evaluations.

Q: What are the key keywords?

A: Disperse dyes, dispersibility, filtration time, filter residue, textile testing, ISO 105, dye formulation, quality control.