Reliable colour printing with the HP Color LaserJet 4550d Dear Customer, the HP Color LaserJet 4550d (also searched as HP 4550d, 4550D or HP Color LaserJet 4500 Series) is a proven office workhorse designed for clear text, sharp graphics and consistent colour output. To keep this printer performing at its best, you need the right toner for printer HP Color LaserJet 4550d and a properly matched drum unit. In this category we bring together carefully selected Original OEM supplies that maintain the quality and reliability this model is known for. Toner and drum unit for HP 4550d – what they do and why they matter In laser printing, toner is the “ink” that creates your documents: it’s a fine powder fused onto paper to produce durable prints that resist smudging and fading. Choosing the correct toner for HP Color LaserJet 4550d is key for accurate colours, readable small fonts and stable performance during higher-volume printing. Equally important is the drum unit—responsible for transferring the image onto the page—so replacing it at the right time prevents common defects like repeated marks, background haze or uneven colour blocks. When you pick an Original OEM toner for HP 4550d, you get a cartridge designed specifically for this engine and colour system, helping you achieve predictable results in everyday business use, such as: - office documents and correspondence with crisp text
- colour charts, presentations and training materials
- marketing handouts and internal reports where colour consistency matters
- graphics and logos that require clean edges and solid fills
Original OEM supplies available in this category (HP 640A series) We keep the offer clear and complete, so you can quickly match the right cartridge to the right colour. In this category you’ll find the full set of HP 640A toners for the HP Color LaserJet 4550d, plus the matching drum unit: - Original OEM Toner HP 640A (C4191A) (Black) – for sharp text and strong contrast
- Original OEM Toner HP 640A (C4192A) (Cyan) – for clean blues and balanced colour mixes
- Original OEM Toner HP 640A (C4193A) (Magenta) – for vivid reds and accurate warm tones
- Original OEM Toner HP 640A (C4194A) (Yellow) – for bright highlights and natural colour blends
- Original OEM Drum Unit HP 640A (C4195A) (Color) – essential for stable image transfer and consistent output
If you’re searching by code, these supplies are often identified by symbols such as C7087A (model-related search phrase) or the cartridge codes listed above. When in doubt, we recommend verifying the code on the cartridge currently installed in your printer. How to choose the right toner for printer HP Color LaserJet 4550d To select the right toner for HP Color LaserJet 4550d, start with two simple checks: the printer family name (HP Color LaserJet 4500 Series) and the cartridge symbol on your existing toner. The colour also matters—black is used most often, while cyan, magenta and yellow are responsible for colour graphics and photos. Also consider the drum unit. Many users replace toners but postpone the drum replacement, and then wonder why print quality is still not perfect. Typical issues that may indicate the drum unit needs attention include: - repeating spots or marks at regular intervals
- washed-out colours or uneven colour patches
- ghosting (a faint duplicate of text/images)
- background shading or “dirty” pages despite new toner
Replacing the drum unit for HP 4550d at the right time often restores the crisp, clean look you expect from this printer. Original OEM vs compatible cartridges – what should you know? In this specific category we focus on Original OEM solutions, because many offices want the most straightforward path to consistent results and hassle-free operation. At the same time, we know many customers compare options. In our store, compatible cartridges (available in other relevant categories) are selected so they can perform just as well as the originals—so if you ever decide to optimise printing costs, we’ll help you choose a compatible solution that meets your expectations for quality and reliability. If you’re unsure whether you need OEM toner, a drum unit, or a complete set for your HP Color LaserJet 4550d, we encourage you to contact us—our team will help you match the right products to your exact printing needs. Order your HP 4550d toner with confidence We encourage you to browse the available toner for HP Color LaserJet 4550d and the matching HP 640A drum unit in this category and choose the colours you need today. If you’d like to avoid downtime, consider ordering a spare black toner and planning drum replacement before print quality drops. CTA: Add the selected cartridges to your basket now, or contact us for quick assistance with choosing the right toner for HP 4550d. We offer convenient ordering, fast dispatch options, and friendly support—so your HP Color LaserJet 4550d can keep printing at its best. | 
