Ink Mixing & Colour Matching SWMS

Ink mixing and colour matching operations expose workers to concentrated solvent vapours, skin sensitisers, and respiratory hazards that exceed routine press-room exposure levels. Workers handling undiluted inks, thinners, and additives face peak exposures during weighing, pouring, and stirring that can exceed workplace exposure limits even when time-weighted averages remain compliant. The WEL reductions for IPA and styrene arriving in December 2026 will directly affect ink mixing operations in offset and screen printing facilities. This SWMS template covers ink weighing, mixing, tinting, and colour matching with controls mapped to the Managing Risks of Hazardous Chemicals Code of Practice binding from July 2026.

Legal Requirements

regulation

WHS Regulation 2025 Part 7.1 — Hazardous Chemicals; Part 8A — Workplace Exposure Limits

hrcw category

Hazardous chemical exposure (solvent vapours, skin sensitisers)

code of practice

Managing Risks of Hazardous Chemicals (binding July 2026 under Section 26A)

section 26a binding

Yes — Hazardous Chemicals code binding July 2026. Non-compliance is admissible as evidence of breach.

Hazards

Hazard	Consequence	Likelihood
Inhalation of concentrated solvent vapours during ink mixing and thinning	Central nervous system depression, liver damage, chronic respiratory disease	Likely
Skin contact with uncured inks containing sensitisers and irritants	Contact dermatitis, skin sensitisation, chemical burns	Likely
Eye splash from ink and solvent during pouring and stirring	Chemical eye burns, temporary or permanent vision loss	Possible
Fire or explosion from flammable solvent vapours near ignition sources	Burns, blast injuries, fatalities	Unlikely
Manual handling of heavy ink drums and solvent containers	Musculoskeletal injuries, crush injuries from dropped containers	Possible

Controls (Hierarchy of Controls)

Conduct all ink mixing in a dedicated mixing room with local exhaust ventilation extracting at the point of vapour generation

Use enclosed mixing systems with sealed lids and mechanical agitation to minimise open-container exposure time

Provide chemical-resistant gloves, safety goggles, and chemical-splash aprons for all mixing tasks

Supply organic vapour cartridge respirators (AS/NZS 1716) where LEV alone cannot maintain exposures below WEL

Store all inks and solvents in dedicated dangerous goods cabinets compliant with AS 1940

Implement spill containment using drip trays under all mixing stations and decanting points

Provide mechanical lifting aids for ink drums exceeding 20 kg

Recent Prosecutions

Printing chemical exposure — multiple jurisdictions$120,000–$250,000 (various cases)

Workers in printing facilities developed occupational dermatitis and respiratory symptoms after prolonged exposure to ink solvents without adequate ventilation or PPE. Employers failed to conduct atmospheric monitoring or provide health surveillance.

2024 — SafeWork NSW and WorkSafe Victoria Enforcement Reports

What Your SWMS Must Include

✓Chemical register listing every ink, solvent, and additive used in mixing operations with current SDS

✓LEV specifications for mixing room including capture velocity at the mixing point

✓PPE selection matrix for each mixing task — gloves, eye protection, respiratory protection

✓Atmospheric monitoring schedule for IPA, styrene, and other solvent vapours during mixing

✓Spill response procedure specific to ink and solvent types used on site

Need a compliant Ink Mixing SWMS?

Our WHS consultants develop ink mixing SWMS with solvent exposure controls mapped to the incoming WEL and ventilation requirements that satisfy regulator expectations.