OKI Pro 9542dn A3 CMYK + White Printer
The OKI Pro 9542 is a professional A3 CMYK + White LED printer designed for label printing, pouch printing, number plates, GHS chemical labels, packaging prototypes and short-run graphic arts production. It prints on dark, coloured and transparent media up to 360 gsm, with SRA3 and banner support, 50 ppm print speed and ultra-high capacity toners yielding up to 51,000 pages. Includes a 3-year on-site warranty.
Available from RGB UK — authorised OKI specialists with over 25 years of professional print expertise. Use our OKI AI Print Engineer for setup and media advice.
OKI Pro 9542 — CMYK + White A3 Printer for Specialist Print Applications
The OKI Pro 9542 is a professional A3 LED colour printer with a fifth toner channel in opaque white. It is the only desktop-format printer capable of delivering CMYK plus white in a single pass, making it the benchmark choice for label printing, packaging prototypes, pouch printing, number plates, chemical labelling and short-run graphic arts production.
Unlike standard CMYK printers, the Pro 9542 produces vibrant, accurate colour on dark, coloured and transparent media — expanding the range of substrates and applications available to any print business or in-house production team. RGB UK are authorised OKI specialists, and the Pro 9542 is one of the most requested printers we supply. We handle everything from pre-sale advice to installation, media profiling, white toner workflow setup and ongoing consumables supply.
Technical Specifications
| Print Technology | OKI ProQ LED Electrophotographic |
|---|---|
| Colours | CMYK + White (5 toner channels) |
| Print Resolution | 1200 x 1200 dpi |
| A4 Print Speed | Up to 50 ppm colour and mono |
| A3 Print Speed | Up to 28 ppm colour and mono |
| Time to First Print | Less than 8 seconds |
| Max Media Size | SRA3 (320 x 450 mm) | Banner up to 1.3 m |
| Media Weight | 64 to 360 gsm simplex | 64 to 320 gsm duplex |
| Standard Paper Tray | 530 sheets |
| Multi-Purpose Tray | 300 sheets |
| Max Paper Capacity | Up to 2,950 sheets with optional feeders |
| Processor | 1.2 GHz |
| RAM | 2 GB |
| Connectivity | USB 2.0 | Gigabit Ethernet |
| Duplex | Automatic two-sided printing |
| OS Compatibility | Windows | macOS |
| Toner Yield (Black) | 51,000 pages |
| Toner Yield (CMY) | 42,000 pages each |
| Toner Yield (White) | 10,000–15,000 pages |
| Drum Yield (CMYK) | 40,000 pages each |
| Drum Yield (White) | 20,000 pages |
| Warranty | 3 Year On-Site Parts and Labour |
| GHS BS5609 Approval | Yes — approved for chemical hazard labelling |
What Makes the OKI Pro 9542 Different
Most A3 colour printers stop at CMYK. The Pro 9542 adds a fifth toner channel in opaque white, which changes what is possible across a wide range of applications. White can be used three ways: as an underlay beneath CMYK to increase vibrancy on dark or coloured media; as a standalone spot colour for premium design effects; or as an overprint for added depth and definition. This single capability opens up substrates and market sectors that are simply not accessible with conventional printers.
The printer uses OKI's ProQ LED technology — a digital LED imaging system that produces sharper dot placement, smoother gradients and more consistent colour output compared to traditional laser printing. Combined with 1200 x 1200 dpi resolution and high-capacity toner cartridges, the Pro 9542 delivers commercial-grade results at desktop scale.
Applications
Label Printing
The OKI Pro 9542 is widely used for short-run label printing on self-adhesive, synthetic, metallic and weatherproof stocks. The combination of white underprint and CMYK overlay means you can produce eye-catching labels on clear, silver, gold and coloured substrates with no need for pre-printed base materials. Print as few as one label or as many as thousands with zero setup cost and no plate changes. Ideal for food, beverage, cosmetics, health and beauty, and industrial labelling.
Pouch Printing
In partnership with SIHL GmbH, OKI developed a range of toner-printable pre-made pouches that run directly through the Pro 9542. The printer handles resealable stand-up pouches for coffee, protein supplements, cosmetics, pet food, spices and confectionery. Short-run flexible packaging that previously required an external print supplier can be produced in-house, on demand, with no minimum order quantities.
Number Plate Printing
The OKI Pro 9542 is certified to print on reflective registration plate media. No additional software or hardware is required. The printer handles reflective acrylic substrates for road-legal number plates, making it a popular choice for car dealerships, forecourts and number plate manufacturers. The white toner channel is used to produce the required reflective base layer before CMYK text and graphics are applied.
GHS Chemical Hazard Labels
OKI is the only printer manufacturer to warrant an entire label printing solution to BS5609 — the standard required for Global Harmonisation System (GHS) chemical hazard labels under IMDG regulations. The Pro 9542 has been independently tested and approved by the Print Industry Research Association (PIRA) to comply with BS5609 Part 3. This makes it a compliant, cost-effective alternative to specialist thermal label printers for businesses required to produce chemical hazard labels in-house.
Packaging Mock-Ups and Carton Proofing
Brand agencies, packaging designers and pre-press studios use the Pro 9542 to produce accurate packaging prototypes on folding boxboard, laminated card and synthetic substrates. White underprint enables true representation of how designs will appear in production, including on dark or colour-coated boards. Print single copies or short proof runs in-house, eliminating the cost and lead time of external proof services.
Wedding Stationery and Greetings Cards
The Pro 9542's ability to print on heavyweight textured, dark and metallic card stocks opens up the premium stationery and greetings card market. Print personalised wedding invitations, place cards, menus and order of service materials on stocks up to 360 gsm. The white toner channel enables full-colour printing on deep-coloured and kraft card without the need for pre-printed backgrounds.
Horticulture Labels
Garden centres and plant nurseries use the Pro 9542 to produce full-colour plant labels, pot pointers, stick-in labels and bed cards in-house and on demand. Print waterproof and weatherproof labels on synthetic stocks, update designs instantly with no plate costs, and produce multiple label designs in a single run. Recommended label media is available from Bluepoint Tags and Labels.
Seed Packet and Paper Bag Printing
The Pro 9542 supports direct printing on pre-made paper bags and seed packets on a range of eco-friendly materials. Retailers and producers can take full control of short-run packaging production, printing as little as one item per design with zero waste and no minimum order quantities.
Consumables for the OKI Pro 9542
The Pro 9542 uses a dedicated set of genuine OKI toners and drums designed specifically for the CMYK + White print engine. High-capacity toner cartridges deliver exceptional cost-per-page economics — black toner yields 51,000 pages and CMY toner yields 42,000 pages each, with white toner rated at 10,000 to 15,000 pages depending on coverage.
Drum units are rated at 40,000 pages for CMYK and 20,000 pages for the white drum. Using genuine OKI consumables is essential for maintaining print quality, protecting the imaging system and retaining the 3-year on-site warranty.
- OKI Pro 9542 Toner Cartridges — full range of CMYK + White toners in stock
- OKI Pro 9542 Drum Units — CMYK and White drums for the Pro 9542
Frequently Asked Questions
Can the OKI Pro 9542 print white on dark paper?
Yes. The Pro 9542 is specifically designed to print opaque white on dark, coloured and transparent media. White toner is applied as an underlay beneath CMYK colours, enabling vibrant full-colour output on substrates that would otherwise produce washed-out or invisible results.
What media weight can the OKI Pro 9542 handle?
The Pro 9542 handles media from 64 gsm up to 360 gsm simplex (single-sided) and up to 320 gsm duplex (double-sided), making it compatible with heavyweight card, label stocks, synthetic materials and specialist print media.
Can I print SRA3?
Yes. The Pro 9542 supports SRA3 (320 x 450 mm) as well as banner lengths up to 1.3 m through the multi-purpose tray. This makes it one of very few desktop printers capable of true SRA3 output.
Is the OKI Pro 9542 approved for GHS chemical labels?
Yes. The Pro 9542 has been independently tested and approved to BS5609 Part 3 for GHS chemical hazard labelling under IMDG regulations. OKI is the only manufacturer to warrant the complete label solution, provided recommended OKI-approved label media is used.
What is the difference between the OKI Pro 9541 and OKI Pro 9542?
The Pro 9541 is a 4-colour CMYK-only printer. The Pro 9542 adds a fifth toner channel in white, enabling printing on dark, coloured and transparent media. If white toner capability is a requirement for your applications, the Pro 9542 is the correct model. If you only require CMYK output, the Pro 9541 offers the same print engine at a lower cost.
Does the Pro 9542 come with a warranty?
Yes. The OKI Pro 9542 includes a 3-year on-site parts and labour warranty as standard when purchased from an authorised OKI reseller such as RGB UK.
Why Buy the OKI Pro 9542 from RGB UK
RGB UK are authorised OKI specialists with over 25 years' experience supplying and supporting professional print hardware. When you buy the Pro 9542 from RGB UK you receive expert pre-sale advice on media compatibility and workflow setup, professional installation and configuration, ongoing support from a team that understands white toner printing, and direct access to genuine OKI consumables at competitive prices.
We are also the development partner behind Dynamic Number Plate solutions using the OKI Pro 9542, with specialist setup guides and media profiles available for number plate applications. If you need guidance on any aspect of the Pro 9542, contact our team or use our OKI AI Print Engineer.
Videos
Watch the official OKI Pro9542 product overview video:
Specification
| Printing Technology | Digital 5 LED Full-color Electrophotographic Printing Method |
|---|---|
| Print Resolution | 1200 x 1200 dpi (2 levels) 1200 x 600 dpi (16 levels) 600 x 600 dpi (2 levels) Physical dot pitch: 1200 dpi |
| Warm-up Time | Approx. 50.0 seconds from power-on Approx. 35.0 seconds from power save |
| First Print Out Time | Color: Approx. 8.0 seconds Mono: Approx. 8.0 seconds |
| Print Speed | A4(Landscape) 50 ppm color, 50 ppm mono A3 28 ppm color, 28 ppm mono |
| Interface | 1000BASE-T/100BASE-TX/10BASE-T, USB 2.0 (High Speed) |
| Protocol | TCP/IP, EtherTalk |
| Printer Language | Adobe PostScript 3, PCL 5c emulation, PCL 6 (XL) emulation, XPS emulation, PDF v1.7 emulation, IBM 5577H-02 Emulation |
| Supported OS (Click here for latest OS) | Windows 10, Windows 10 x64, Windows 8.1, Windows 8.1 x64, Windows 8, Windows 8 x64, Windows 7, Windows 7 x64, Windows Vista, Windows Vista x64, Windows XP, Windows XP x64, Windows Server 2012 R2, Windows Server 2012, Windows Server 2008 R2, Windows Server 2008, Windows Server 2008 x64, OS X 10.10, OS X 10.9, OS X 10.7, Mac OS X 10.6, Mac OS X 10.5, Linux |
| Memory (Std./Max.) | 2GB/2GB |
| Hard Disk Drive | (Optional) 160 GB |
| Font | Adobe PostScript 136 fonts, PCL emulation 87 scalable fonts, 4 bitmap fonts |
| Paper Size | Tabloid extra (12″ x 18″), Tabloid (11″ x 17″), Legal 13, Legal 13.5, Legal 14, Letter, Executive, Index Card (3″ x 5″) (75 x 125mm), A3, A4, A5, A6, B5, B4, A3+, SRA3, SRA4, Statement, Envelopes, Postcard, Return postcard, Banner, B6 Half, B6, 8K, 16K |
| Paper Weight | Tray 1 : 52 – 320 gsm (Optional)Additional Tray : 52 – 320 gsm Multi-purpose tray : 52 – 360 gsm |
| Input Capacity | Tray 1 : 530 sheets (Optional)Additional Tray : 530 sheets Multi-purpose tray : 300 sheets |
| Output Capacity | Face Down : Max. 610 sheets Face Up : Max. 300 sheets |
| Dimensions(WxDxH) | 699 x 625 x 640 mm |
| Weight(includes supplies) | Approx. 116.5 kg |
| Weight(not includes supplies) | Approx. 91.0 kg |
| Operating Environment | Operating: 10 – 32 °C, 20 – 80 %RH Storage: 0 – 43 °C, 10 – 90 %RH No condensation |
| Power Source | Single phase 230 VAC ±10%, 50/60 Hz ±2% |
| Power Consumption | Operating: Max. 1,500W / Ave. 1,100W Idle: 40W Power Save: 30.0W Deep Sleep: 4.0W Auto-Off: 0.4W |
| Safety & Environment Regulation | Energy Star, EMC-Directive, CE Mark, GS Mark, CCC Mark, cULus Mark |
| Noise Level | Operating :Approx. 57 dBA Idle: < 34 dBA Power Save: < 30 dBA or Background level |
| Duty Cycle | Recommended: 25,000 pages/month Maximum: 300,000 pages/month |
| In the Box | Manuals, DVD-ROM, Starter toner cartridge x 5, Image Drum x 5, Power cable |
Key Features
- CMYK + white printing using digital LED and multi‑level ProQ technology for sharp 1200 × 1200 dpi resolution.
- High‑speed performance with up to 50 ppm (A4) and 28 ppm (A3) print speeds and first‑page output in as little as 8 seconds.
- Flexible media handling from A6 to SRA3 and banners up to 1.3 m long; supports paper weights up to 360 gsm single‑sided and 320 gsm duplex.
- Print on speciality media such as film, polyester, waterproof paper, transfer paper and glossy stock.
- Large paper capacity: 530‑sheet standard tray expandable up to 2,950 sheets, plus a 300‑sheet multipurpose tray for envelopes, labels and heavy media.
- Energy‑efficient design and high‑capacity toner cartridges for a low total cost of ownership; use genuine OKI consumables for best results.
- Ideal for packaging, signage, proofing and on‑demand printing—delivers vibrant colour and solid white spot colour for professional, eye‑catching.
If you are comparing options, you may also want to explore our full range of OKI A3 colour graphic printers.
Support Resources
Frequently Asked Questions
What makes the OKI Pro9542 unique?
It prints CMYK plus solid white in a single pass using digital LED technology, producing vibrant colour and white spot highlights for packaging, signage and proofing.
What print resolution does it offer?
It produces sharp 1200 × 1200 dpi output thanks to the digital LED and multi‑level ProQ technology.
How fast can it print?
The printer delivers up to 50 pages per minute on A4 and 28 pages per minute on A3, with a first page out in approximately 8 seconds.
What media sizes and weights are supported?
The Pro9542 handles everything from A6 to SRA3 and banners up to 1.3 m long, and can print on paper weights up to 360 gsm single‑sided and 320 gsm duplex.
Can it print on special materials?
Yes. It supports film, polyester, waterproof paper, glossy stock, transfer paper and other specialty substrates via the multipurpose tray.
Does it integrate with colour‑management systems?
An optional EFI Fiery XF front‑end provides advanced colour management and proofing capabilities.
Is it cost‑effective to operate?
The energy‑efficient design and high‑capacity toner cartridges help keep running costs low; using genuine OKI consumables is recommended for optimum performance.
