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HP LaserJet Pro 100 M175a review

Our Rating :
Price when reviewed : £200
inc VAT

Although the LaserJet Pro 100 is a very capable small office colour laser MFP, its running costs are too high


four-pass colour laser, 16ppm print speed, USB, 338x441x421mm

While most printer manufacturers, such as Epson, seem to be trying to make their business inkjets look more like laser printers, HP appears to be doing it the other way around. The LaserJet Pro 100 closely resembles the Officejet inkjet range, with a curved case and prominent 35-page ADF. This is a good thing, as previous LaserJet MFPs have been rather ugly. Build quality is sturdier than most its inkjet siblings, too.

The M175a is designed to take up as little space as possible, so the toner cartridges are loaded into a rotating caddy. The lid has to be shut while the caddy rotates, so changing a full set of cartridges involves a lot of opening and closing. Although the LaserJet 100 doesn’t have a colour screen an fancy interface, a bank of buttons and a mono LCD make it easy to copy documents and send scans to a PC.

HP LaserJet Pro 100 M175a

Mono text prints are pin-sharp, as you’d expect. Colour prints are detailed, have accurate colours and are smoothly shaded. The toner doesn’t have the glossy finish we’ve seen from some colour lasers, but its prints look great on even thin, poor-quality printer paper. This is an advantage over most inkjets, which require a minimum of 80gsm paper to avoid wrinkling due to moisture from the ink. On the other hand, although the Pro 100 had a decent stab at printing our test photos, the results are never going to be something you’ll want to frame and put up in the sitting room.

The M175a is certainly fast enough when it comes to mono printing, at 12.4ppm. As it’s a four-pass printer, paper has to be sent around the engine four times for full colour. This limits speed to a comparatively slow 3.5ppm, but that’s still faster than all but the speediest business inkjets. Unfortunately, colour costs are painfully high at 18.5p for a mixed black and colour page. Even a page of mono text costs 3.8p – a figure that’s high when compared to almost any inkjet.

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Basic Specifications

Rating ****
Maximum native print resolution 600x600dpi
Max optical resolution 1,200×1,200dpi
Output bit depth 30-bit

Quoted Speeds

Quoted speed, mono A4 16ppm
Quoted speed, colour A4 4ppm

Tested Print Speeds

Time for two 10x8in photos 1.0 53s
Time for six 6x4in photos 1.0 1m 7s

Physical and Environmental

Standard printer interfaces USB
Optional printer interfaces none
Size 338x441x421mm
Weight 16.2kg
Noise (in normal use) 47dB(A)
Duty cycle 20,000 impressions

Paper Handling

Maximum paper size A4
Maximum paper weight 200gsm
Standard paper inputs 1
Standard paper input capacity 150
Maximum paper inputs 1
Maximum paper input capacity 150
Duplex (code, cost if option) No


Printer technology four-pass colour laser
Language(s) HP PCL 6, HP PCL 5c
Supported operating systems Windows XP/Vista/7, Mac OS X 10.5.8 – 10.6, Linux
Maximum printer memory 128MB
Other laser features and options £118

Buying Information

Price £200
Price per colour A4 page 14.7p
Price of 2nd paper cassette N/A
Warranty one year RTB

Tested Scan Speeds

Full scan area preview 11s
A4 document at 150dpi N/A
A4 document at 300dpi 11s
6x4in photo at 600dpi 34s
6x4in photo at 1200dpi 1m 48s
Single 35mm negative at 2400dpi N/A

Tested Copy Speeds

Time for single A4 mono copy 1.0 18s
Time for single A4 colour copy 1.0 36s
Time for 10 A4 copies using feeder 2.0 1m 48s

Copy Features

Maximum number of copies 99
Copier zoom range 25-400%
Max mono copy resolution 300x300dpi
Max colour copy resolution 300x300dpi

Fax Features

Fax modem speed N/A
Max mono fax resolution N/A
Fax memory (maximum mono pages) N/A