Overview
EN ISO 105‑Z05:1998 (ISO 105‑Z05:1996) specifies a standardized laboratory method for determining the dusting behaviour of dyes used in textiles. The test quantifies how much airborne dust is generated when a defined quantity of a solid dyestuff is handled in a dust‑generating device and collected on a filter for assessment. Measuring dustiness is important for hygiene, occupational health and safety, and quality control in dye production and textile processing.
Key topics and technical requirements
- Scope: Method for the determination of dyestuff dusting behaviour (solid dyes in various physical forms).
- Apparatus: A dust‑generating device with feed hopper, slide valve, vertical drop tube and dust chamber; filter holder; vacuum pump; flow regulator/flowmeter; timer; and analytical and routine balances.
- Test sample and delivery: A weighed sample (typically around 10 g) is dropped through the device; dust is extracted after a short delay using a controlled vacuum and airflow.
- Control parameters: Specified air flowrate (example: 15 l/min), extraction time (example: 120 s starting 5 s after release), fall height and defined filter dimensions and pore size (