hp officejet pro x551dw vs. · custom test report buyers la b.com 2012 buyers laboratory inc. this...

Custom Test Report

BuyersLab.com © 2012 Buyers Laboratory Inc. This report is the sole property of BLI. Duplication in any manner is illegal and strictly forbidden without written permission from BLI. Violators will be prosecuted. To purchase reprints of any BLI publication contact Buyers Laboratory Inc. at [email protected] report has been reproduced with the written permission of Buyers Laboratory LLC. Any duplication of this report without the written permission of Buyers Laboratory is unlawful and violators will be prosecuted. ©2014 Buyers Laboratory LLC. To purchase reprints, contact BLI at (201) 488-0404 (x17) or at [email protected]. • 041405

OVERALL PERFORMANCE RATINGS

HP Officejet Pro X551dw Lexmark CS410dn Ricoh SP C320DN

Reliability Very Good Good Very Good

Consumables and packaging waste Excellent Good Fair

TEC Energy Consumption Excellent Fair Fair

Color Output Quality Very Good Very Good Good

Black Output Quality Very Good Very Good Good

*Ratings in the table above indicate the rating of the product among this competitive group.

Test Objective

Buyers Laboratory LLC was commissioned by Hewlett-Packard to conduct comparative reliability, im-age quality, energy consumption, and consumables and packaging waste generation testing on the HP Officejet Pro X551dw inkjet model versus the Lexmark CS410dn and Ricoh SP C320DN, which use laser technology. BLI used its proprietary image quality evaluation methods, and test methods that are consistent with the Energy Star Typical Electricity Consumption (TEC) methodology for the com-parative energy evaluation. For reliability testing, two of the HP Officejet Pro models and two each of the competitive models were tested for 150,000 impressions each. To evaluate consumables and packaging waste, BLI technicians collected and weighed all the spent cartridges, waste toner con-tainers and imaging units used by one of each model during the course of the 150,000-impression test, as well as all related packaging for these items.

Comparative Reliability, Energy Consumption, Image Quality and Waste Evaluation

HP Officejet Pro X551dw vs. Competitive Laser Models

JULY 2014

2 BuyersLab.com This report has been reproduced with the written permission of Buyers Laboratory LLC. Any duplication of this report without the written permission of Buyers Laboratory is unlawful and violators will be prosecuted. ©2014 Buyers Laboratory LLC. To purchase reprints, contact BLI at (201) 488-0404 (x17) or at [email protected]. • 041405

COMPARATIVE CUSTOM TEST REPORT

HP OFFICEJET PRO X551DW VS. COMPETITIVE LASER MODELS


Street Price $599.99 $499 $649

Technology Ink Laser Laser

Max Monthly Duty Cycle 80,000 impressions 75,000 impressions 75,000 impressions

System Memory (Std/Max) 512 MB/512 MB 256 MB/2.25 GB 384 MB/768 MB

Print speed (Color/Black) 42 ppm/42 ppm 32 ppm/32 ppm 26 ppm/26 ppm

Std Paper Capacity 550 sheets 250 sheets 500 sheets

Max Paper Capacity 1,050 sheets 1,450 sheets 1,100 sheets

Black Ink/Toner Yield 9,200 pages 4,000 pages 7,200 pages

Color Ink/Toner Yield 6,600 pages 3,000 pages 6,600 pages




Executive Summary

Over the course of BLI’s 150,000-impression test, the HP Officejet Pro X551dw demonstrated a consider-able advantage over the competitive laser models tested in several of the test categories. Not only did the HP model generate the least amount of consumables and packaging waste (up to 94% less by weight), but it also consumed significantly less energy than the competitive laser printers tested. In fact, the HP model consumed 75.6 percent less energy than the Lexmark model and 80.3 percent less energy than the Ricoh model in BLI’s energy testing.

In terms of overall reliability, the two HP test units experienced fewer total misfeeds than the Lexmark and Ricoh models. While the HP models experienced two misfeeds, the Ricoh units experienced a total of three misfeeds, and the Lexmark units experienced a total of nine misfeeds. The Ricoh model also experienced two image quality defects related to defective toner cartridges that were resolved by replacing the car-tridges, while the HP models experienced a total of three error codes that were cleared by powering off and back on.

In BLI’s standard image quality evaluation, which uses a combination of visual examination, magnification and densitometer readings, the HP model produced output in default mode that was on par overall with that of the Lexmark model and superior to that of the Ricoh model. Though the Lexmark and HP models both produced very good image quality, the Lexmark model has a slight edge, with more vibrant color output and crisper output in black mode. Though clearly acceptable for general office use, the HP model’s black output exhibited slight ink overspray and jagged edges on text, both of which are common with inkjet technology. Black output from the Officejet Pro X551dw was better, however, than that produced by the Ricoh model.

Based on the results of this test, BLI feels the HP Officejet Pro X551dw delivered the best performance overall, with vastly better energy efficiency and waste generation, and reliability and image quality that is on par with or better than that of the laser competitors, making it a strong choice for general office environ-ments.




Reliability Testing

Printer reliability should be a key concern for buyers, since a reliable device helps minimize downtime, resulting in improved worker productivity. BLI conducted comparative reliability testing on all six of the test units, with each run for 150,000 impressions over 40 business days, using a variable test schedule to simulate real-world usage (for instance, varying run lengths, incorporating periods of high and low print volumes, as well as periods of inactivity).

During these BLI tests, the Officejet Pro X551dw units completed reliability testing with the fewest total mis-feeds. Both X551dw units each experienced one misfeed. In contrast, one Lexmark CS410dn experienced three misfeeds while the other experienced six, for nine total misfeeds. One of the two Ricoh SP C320DN devices experienced three misfeeds, while the other unit experienced none.

However, one Ricoh unit experienced image quality issues that required BLI technicians to replace toner cartridges that were defective (one had a faulty chip that did not prompt the operator when it was empty and the other produced excessive toner speckling down the center of pages that could not be cleared with a calibration procedure) (see Exhibits A and B on pages 5 an 6). One of the two Officejet Pro X551 units encountered two error messages. The first was a false error code, informing the operator that “Paper is too Short.” And the second was after reinstalling the duplex unit; the LCD stated “Preparing to Print, 0 Seconds,” but printing did not begin. Both error messages were cleared by turning the print off and on again. The second test unit also encountered an error message that didn’t immediately clear during one of the misfeeds; the unit indicated a jam on the LCD (“Print Zone Jammed”), the BLI technician removed the misfeed and unit resumed printing but the messaged remained on the LCD until the job finished printing and the technician pressed OK on the control panel.

Table A:

Reliability Summary

OVERALL RELIABILITY

Model Total Misfeeds Misfeed Rate Service Calls Other Issues

& Malfunctions TOTALAverage

Number of Issues

Lexmark CS410dn 9 1 misfeed per

33,333 impressions 0 0 9 (over 2 machines

tested) 4.5

Ricoh SP C320DN 3 1 misfeed per

100,000 impres-sions

0 2 5 (over 2 machines tested) 2.5

HP Officejet Pro X551dw 2

1 misfeed per 150,000 impressions

0 3 5 (over 2 machines tested) 2.5




Table B:

Detailed Reliability Data

RELIABILITY TEST TOTALS

Unit Model Total Misfeeds Service Calls Other Issues & Malfunc-tions TOTAL

A Lexmark CS410dn 3 0 0 3

B Lexmark CS410dn 6 0 0 6

C Ricoh SP C320DN 0 0 2 2

D Ricoh SP C320DN 3 0 0 3

E HP Officejet Pro X551dw 1 0 2 3

F HP Officejet Pro X551dw 1 0 1 2

Exhibit A: Ricoh SP C320DN Black Speckling

At 58,819 impressions into testing, a defective cartridge, which had just been installed about 150 impressions prior, caused speckling on output. BLI technicians replaced the black toner cartridge, which resolved the issue. Output enlarged to show detail.




Exhibit B: Ricoh SP C320DN Black Dropout/Fade

At 73,707 impressions into testing, a defective cartridge resulted in dropout and fade of black output; upon further investigation, technicians found the cartridge was empty, but the device never indicated it as such and printing was allowed to continue. BLI technicians replaced the black toner cartridge, which resolved the issue. Output enlarged to show detail.




Consumables and Packaging Waste

Total Consumables and Packaging Waste Generated at 150,000 Impressions

(Based on testing with the ISO 24712 test target)

Packaging and supplies waste can have multiple impacts on businesses, as well as on the environment. For instance, in enterprise environments, limiting supplies waste can help reduce storage space requirements and costs, lower shipping expenses, and reduce recycling/disposal expenses, while favorably impacting the environment. In BLI’s evaluation of consumables waste for one of each model tested, the HP Officejet Pro X551dw not only used the fewest cartridges to print 150,000 pages, which means fewer interuptions to change supplies, but also produced the least amount of consumables and packaging waste over the test—in fact, by as much as 94.2% less by weight. The total weight of all cartridges and cartridge packag-ing required to print 150,000 impressions was just 12.52 pounds (5,678.98 grams) for the HP model. Total weights of all user-replaceable consumable items used (toner, drums and waste containers) and associ-ated packaging for the competitive devices ranged from 114.38 pounds (51,881.90 grams) for the Lexmark CS410dn to 216.85 pounds (98,361.51 grams) for the Ricoh SP C320DN.

Table C:

Total Toner/Ink Cartridges Used Over 150,000 Impressions

Manufacturer ModelTotal cartridges required to print 150,000 pages

Cyan Magenta Yellow Black

HP Officejet Pro X551dw 21 21 21 14

Lexmark CS410dn 44 41 41 38

Ricoh SP C320DN 24 24 21 21

Table D:

Total Consumables and Packaging Waste Over 150,000 Impressions

ModelTotal Waste Weight (Drum Units,

Toner/Ink Cartridges, Waste Toner and Packaging) in Pounds

Total Waste Weight (Drum Units, Toner/Ink Cartridges, Waste Toner

and Packaging) in Grams

Percent More Waste Generated vs. HP OJ Pro X551dw

HP OJ Pro X551dw 12.52 5,678.98 -

Lexmark CS410dn 114.38 51,881.90 813.60%

Ricoh SP C320DN 216.85 98,361.51 1,632.00%




12.52

114.38

216.85

0

50

100

150

200

250

HP OJ Pro X551dw Lexmark CS410dn Ricoh SP C320DN

Total Consumables and Packaging Waste (in pounds)

5,678.98

51,881.90

98,361.51

0.00

20,000.00

40,000.00

60,000.00

80,000.00

100,000.00

120,000.00

HP OJ Pro X551dw Lexmark CS410dn Ricoh SP C320DN

Total Consumables and Packaging Waste (in grams)




Note: Weights above include all user replaceable consumable items used (toner, drums, waste containers, etc.) and associated packaging.

The HP Officejet Pro X551dw generated 12.52 pounds of waste, consisting of 77 cartridges, plus associated packaging.

The Lexmark CS410dn generated 114.38 pounds of waste, consisting of 164 toner cartridges, 2 drum unit kits and 7 waste containers, plus associated packaging.

The Ricoh SP C320DN generated 216.85 pounds of waste, consisting of 90 toner cartridges, one waste container, one main-tenance kit and one image transfer kit, plus associated packaging.

^




Comparative Energy Consumption Testing

As corporate responsibility to the environment has moved to the forefront in many industries, many com-panies have adopted and continue to enforce policies to maximize the energy efficiency of systems and devices within the enterprise, including PCs and printers. Because a printer's energy consumption is a significant part of the printing cost of a device that not only affects the company’s bottom line, but also its environmental impact, HP commissioned BLI to conduct a comparative energy-consumption evalua-tion using test methods consistent with the ENERGY STAR Typical Electricity Consumption (TEC) method, with the energy consumed recorded as kilo-Watt hours (kWh). The test measures the energy that is con-sumed over a specified period, during which each device prints multiple single-sided sets of a 12-page black document and also spends time in sleep mode, warm-up mode and ready mode. For the three models comprising this group, typical usage is assumed as being 288 pages per day. The values that are reported for each device have been calculated to reflect one week’s worth of electricity consumption. Note that calculations are based on single devices only, and values would increase as the number of de-vices deployed in the fleet increases.

• Based on BLI’s testing, it is projected that during a typical week of usage the HP Officejet Pro X551dw will consume the least amount of energy, at just 0.499 kWh. The Lexmark CS410dn comes in second, at 2.041 kWh, followed by the Ricoh at 2.531 kWh.

• As shown in Table E, the Lexmark CS410dn consumed 309.1 percent more energy than the HP model, while the Ricoh SP C320DN consumed 407.2 percent more energy than the HP model.

Table E:

Percent Difference in Weekly Energy Consumption Compared to HP

Typical Weekly Electricity Consumption (kWh)

Percent More Energy Consumption vs. HP Officejet Pro X551dw

HP Officejet Pro X551dw 0.499 -

Lexmark CS410dn 2.041 309.10%

Ricoh SP C320DN 2.531 407.20%

0.499

2.041

2.531

0

0.5

1

1.5

2

2.5

3


Typical Weekly Electricity Consumption (kWh)




Image Quality

Business users want quality, consistent output, and to get the results they expect the first time; if users have to reprint a page because colors are wrong or quality is lacking, time and resources have been wasted. BLI evaluated image quality of all the devices using the ISO 24712 test suite on 24-lb. multipurpose paper with ColorLok technology at 10,000-page intervals throughout testing.

HP Officejet Pro X551dw output on ColorLok paper exhibited accurate color production.

Although the HP and Lexmark models both produced very good overall black and color output, the Lexmark had a slight advantage, due in part to higher solid density readings and brighter color output (technicians noted the HP devices’ color output, though very good, was not as vibrant as that produced by the Lexmark model). Despite some minor overspray and jagged edges typical of ink technology, the HP’s black output was very good overall and certainly suitable for general office use (see exhibits on pages 13-17).

In terms of consistency of output over time, BLI found that the HP model showed less variation in density readings for all four colors compared to the Ricoh model and for yellow, cyan and magenta when compared to the Lexmark model; however, the CS410dn showed the least variation in black density readings (see graphs on pages 12 and 13). Over the course of testing, BLI technicians noted that a visual examination showed that black and color output from the HP model remained very consistent; black output from the Ricoh model had inconsistent coverage and became even more mottled and blotchy as testing progressed




(see Exhibits D and E on page 14). Technicians also noted pastel shades produced by the Lexmark model became inaccurate (blue shifted toward cyan).

Note that to maintain optimum image quality, at about 50,000, 72,000, 85,000, 93,000 and 130,000 im-pressions into testing the HP units prompted the operator to pull out the duplex unit and re-install it. This message occurred after completion of a print job and this very simple procedure took about 10 seconds to execute. According to HP, this behavior will be modified with a firmware update scheduled for September 2014.

Table F:

Maximum Density Variance Over 150,000 Impressions

HP Officejet Pro X551dw Maximum Density Variance

Lexmark CS410dn Maximum Density Variance

Ricoh Aficio SPC320dn Maximum Density Variance

Cyan 6.32% 10.53% 31.13%

Magenta 7.27% 13.56% 16.52%

Yellow 5.26% 7.14% 17.50%

Black 6.77% 5.59% 26.36%

Maximum density variance is calculated as a percentage of change in density readings from the highest to the lowest, based on density readings taken at the start of testing and every 10,000 pages throughout the test period. A smaller number indicates less fluctuation in output.

HP Officejet Pro Color X551dw Density Readings

0.96 0.960.99 1.01 1 0.99 1.01 0.99 0.98 0.98 0.96

0.99 0.97 0.960.98 0.95

1.1 1.121.16 1.17 1.15 1.14

1.17 1.15 1.16 1.181.13

1.18 1.16 1.161.11

1.17

0.98 0.97 0.98 10.97 0.96 0.98 0.96 0.98 0.96 0.97 0.95 0.96 0.95

0.98 0.96

1.42

1.351.38 1.36 1.36 1.34

1.37 1.36 1.37 1.35 1.34 1.341.37

1.33 1.34 1.33

0.8

0.9

1

1.1

1.2

1.3

1.4

1.5




Lexmark CS410dn Density Readings

1.361.40 1.42

1.391.45

1.37 1.35

1.441.41 1.42

1.45 1.46 1.44

1.33

1.411.47

1.18

1.301.34

1.26 1.26 1.25 1.25

1.33 1.31 1.29 1.31 1.33 1.32

1.21

1.301.34

1.05 1.03 1.01 1.02 1.02 1.02 1.011.04 1.05 1.03 1.03 1.05 1.05

0.98

1.05 1.04

1.44 1.461.51 1.50

1.441.48

1.43 1.44 1.451.49

1.45 1.471.50

1.43 1.451.51

0.80

0.90

1.00

1.10

1.20

1.30

1.40

1.50

1.60

Cyan

Magenta

Yellow

Black

Ricoh SP C320DN Density Readings

1.06

1.22

1.09

1.30

1.18

1.09

1.201.16

1.26

1.17

1.06

1.191.16

1.391.28 1.34

1.171.21

1.311.28

1.181.22

1.261.21

1.16

1.151.20

1.34

1.22

1.34

1.201.16

0.810.86 0.88

0.81

0.91

0.800.86

0.820.89

0.86

0.940.90

0.84

0.92

0.83

0.91

1.431.48

1.401.46

1.361.29

1.45 1.46

1.31

1.53

1.31

1.63

1.47

1.341.37 1.36

0.80

0.90

1.00

1.10

1.20

1.30

1.40

1.50

1.60

1.70




Exhibit D: Ricoh SP C320DN Mottled Black Output

Early in testing, BLI technicians noted mottling in solid black areas of page 5 of the test target used for the test. Output enlarged to show detail.

Exhibit E: Ricoh SP C320DN Mottled Black Output

When the black cartridge had about 10% life remaining, BLI technicians noted more severe mottling in solid black areas. Output enlarged to show detail.




Exhibit F: HP Officejet Pro X551dw Color Print Samples

HP color output, though most colors were accurately produced, exhibited slightly reddish skin tones and was not as vibrant as the output from the Lexmark model.

Exhibit G: Lexmark CS410dn Color Print Samples

Color output from the Lexmark model was vibrant, though skintones had a slight red undertone. In addition, color production became more inaccurate, as blue output shifted toward cyan.

Exhibit H: Ricoh SP C320DN Color Print Samples

Color saturation in output from the Ricoh model was not as bright as that from the other models. In addition, some pastel shades and back-grounds were washed out and colors inaccurately produced. Skin tones were natural looking at the start of testing, though they appeared more reddish as testing progressed.




Exhibit I: HP Officejet Pro X551dw Black Print Samples (magnified to show detail)

Black output from the HP model exhibited jagged edges and some ink overspray when viewed under magnification. To the unaided eye, text was not as crisp as that produced by the laser models.

Exhibit J: Lexmark CS410dn Black Print Samples (magnified to show detail)

Black output from the Lexmark model was dark and fully formed, with above-average sharpness and smoothness.




Exhibit K: Ricoh SP C320DN Black Print Samples (magnified to show detail)

Black output from the Ricoh model was dark, but not crisp, due to toner overspray. At several points throughout testing, particularly as the black cartridge neared end of life, toner coverage was less consistent, with black output becoming visibly blotchy.




Appendix A: Supporting Test Data

Section 1: Relibility Data

Detailed Breakdown of Reliability Issues Encountered

Unit Model Meter Issues Encountered

C

Ricoh Aficio SP C320DN

58,819

After changing black cartridge, technicians ran about 150 pages, after which black toner speckles were visible down the center of the page. Calibration did not resolve problem. Replacing the black cartridge, which was defective, resolved the problem.

73,707Black print completely faded due to the cartridge being empty but no message appeared on the LCD. BLI’s test technician replaced the depleted cartridge, which resolved the problem.

E HP OfficeJet Pro X551dw

Unknown

During a duplex print job the following message appeared: “Paper is too Short—Print Job will be cancelled. Printer cannot print on paper shorter than 4.5 / 11.4. If the paper is longer, make sure it is oriented correctly in your input tray.” Printer was powered off and then back on, which cleared the error.

130,007

Message on LCD prompted operator to “Reinstall Duplexer to Maintain Print Quality.” After re-installing the duplexer, LCD read “Preparing to Print “0” Sec-onds”; the machine never came out of this state. Printer was powered off and then back on, which cleared the error.

F HP OfficeJet Pro X551dw 145,020

Message on LCD read “Print Zone Jammed”; technician cleared the jam in the left door of the device and selected OK, device resumed printing but the error message on the LCD did not clear. The print job completed; technician again hit the OK key to clear the message and the message cleared.




Section 2: Consumables and Packaging Waste Data

Toner/Ink Cartridges Used Over 150,000 Impressions

Manufacturer ModelTotal cartridges required to print 150,000 pages

Cyan Magenta Yellow Black

Lexmark CS410dn 44 41 41 38

Ricoh SP C320DN 24 24 21 21

HP Officejet Pro X551dw 21 21 21 14

Toner/Ink Cartridges Used Over 150,000 Impressions

44

24

21

41

24

21

41

21 21

38

21

14

0

5

10

15

20

25

30

35

40

45

50

Lexmark CS410dn Ricoh SP C320DN HP Officejet Pro X551dw

Cyan Cartridges

Magenta Cartridges

Yellow Cartridges

Black Cartridges

The color-coded bars in the graph above indicate the number of each color cartridge (magenta, yellow, cyan and black) used to print 150,000 impressions.




Maintenance Items Used over 150,000 Impressions

7

1

2

1 1

0

2

4

6

8

10

Lexmark CS410dn Ricoh SP C320DN HP Officejet Pro X551

Maintenance Items Used During the 150,000-impression Test

Waste Ink /Toner Containers

Imaging Unit Kits

Maintenance Kits

Image Transfer Units

Maintenance Parts Lexmark CS410dn Ricoh SP C320DN HP Officejet Pro X551

Waste Ink /Toner Containers 7 1 0

Imaging Unit Kits 2 0 0

Maintenance Kits 0 1 0

Image Transfer Unit 0 1 0

The HP Officejet Pro X551dw inkjet device does not require a drum unit. The Ricoh SP C320DN uses all-in-one cartridges that incorporate the imaging unit into the toner cartridge. The Ricoh Maintenance Kit includes the fuser and the paper transfer unit.

Total Waste Collected over the 150,000-impression Test(Waste includes all exhausted toner cartridges, drum units, waste toner containers and packaging for all)

Total Waste Weight for Drum Units/ Toner Cartridges/Waste Toner Containers/Imaging Units and All Related Packaging during the 150,000-impression Test in lbs.

Machine Number Manufacturer Model Total Waste Weight (Drum Units, Toner/Ink

Cartridges Waste Toner and Packaging) in lbs.

1 Lexmark CS410dn 114.38

2 Ricoh SP C320DN 216.85

3 HP Officejet Pro X551dw 12.52

Note: Return shipping labels are included with all HP, Lexmark and Ricoh supplies.




Section 3: Image Quality Data

Image Quality Scores Over 150,000 Impressions*

HP Officejet Pro X551dw 0 10K 20K 30K 40K 50K 60K 70K 80K 90K 100K 110K 120K 130K 140K 150K Average Total

Text 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4.00 64

Line Art 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4.00 64

Solids 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4.00 64

Color Business Graphics 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4.00 64

Color Photo-graphic Output 4 4 4 4 4 4 4 4 5 5 5 5 5 5 5 5 4.50 72

Density Range 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4.00 64

Total 392

Image Quality Scores Over 150,000 Impressions*

Lexmark CS410dn 0 10K 20K 30K 40K 50K 60K 70K 80K 90K 100K 110K 120K 130K 140K 150K Average Total

Text 4 4 4 4 4 4 4 4 4 4 4 4 4 4 3 4 3.94 63

Line Art 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4.00 64

Solids 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5.00 80



Density Range 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5.00 80

Total 417

Ricoh SP C320DN 0 10K 20K 30K 40K 50K 60K 70K 80K 90K 100K 110K 120K 130K 140K 150K Average Total

Text 3 3 3 3 3 3 3 3 3 3 3 4 4 3 4 3 3.19 51

Line Art 4 4 4 4 4 3 4 3 3 3 3 4 4 4 4 4 3.69 59

Solids 4 4 4 4 4 3 4 3 3 4 4 4 4 3 4 3 3.69 59



Density Range 5 5 5 5 4 3 4 4 4 5 5 5 4 4 4 4 4.38 70

Total 337

Numbers in the charts above indicate BLI’s standard image quality ratings, where 5 = Excellent, 4 = Very Good, 3 = Good, 2 = Fair and 1 = Poor.




Density Readings Over 150,000 Impressions**

HP Officejet Pro X551dw Start 10,000 20,000 30,000 40,000 50,000 60,000 70,000 Average Maximum

Variance

Cyan 0.96 0.96 0.99 1.01 1.00 0.99 1.01 0.99 0.99 5.21%

Magenta 1.10 1.12 1.16 1.17 1.15 1.14 1.17 1.15 1.15 6.36%

Yellow 0.98 0.97 0.98 1.00 0.97 0.96 0.98 0.96 0.98 4.17%

Black 1.42 1.35 1.38 1.36 1.36 1.34 1.37 1.36 1.37 5.97%

Lexmark CS410dn Start 10,000 20,000 30,000 40,000 50,000 60,000 70,000 Average Maximum

Variance

Cyan 1.36 1.40 1.42 1.39 1.45 1.37 1.35 1.44 1.40 7.41%

Magenta 1.18 1.30 1.34 1.26 1.26 1.25 1.25 1.33 1.27 13.56%

Yellow 1.05 1.03 1.01 1.02 1.02 1.02 1.01 1.04 1.03 3.96%

Black 1.44 1.46 1.51 1.50 1.44 1.48 1.43 1.44 1.46 5.59%

Ricoh SP C320DN Start 10,000 20,000 30,000 40,000 50,000 60,000 70,000 Average Maximum

Variance

Cyan 1.06 1.22 1.09 1.30 1.18 1.09 1.20 1.16 1.16 22.64%

Magenta 1.17 1.21 1.31 1.28 1.18 1.22 1.26 1.21 1.23 11.97%

Yellow 0.81 0.86 0.88 0.81 0.91 0.80 0.86 0.82 0.84 13.75%

Black 1.43 1.48 1.40 1.46 1.36 1.29 1.45 1.46 1.42 14.73%

**The higher the number the darker the density.




Appendix B: Test Methodology

Test Environment

Testing was conducted under ambient conditions of 68F to 78F and 45% RH (+/- 10%), monitored daily by an Extech RH520 temperature/humidity digital recorder and Honeywell Model 61 Seven-Day Temperature/Humidity Chart Recorder, in BLI’s test facility located at 20 Railroad Avenue, Hackensack, NJ (U.S.A).

Test Equipment

BLI’s dedicated test network, consisting of Windows 2003 servers, Windows 7 Professional worksta-tions, 10BaseT/100BaseTX network switches and CAT5 cabling, Yokogawa WT210 power meter, Pow-erstat voltage regulator and ESP D5143NT Transient Voltage Surge Supressor.

Test Procedures

For electricity consumption testing, a method similar to and consistent with ENERGY STAR Typical Electricity Consumption (TEC) principles was used to determine typical weekly energy usage for each device, which is based on printing 288 pages per day, with the device spending the remainder of the time in idle and sleep modes after printing is completed. The Yokagawa WT210 power meter was used to measure energy usage during all modes for each device. Reliability testing was performed using GP Spectrum and/or Boise X9 20-lb. bond and GP 30% recycled paper. Image quality was evalu-ated on HP ColorLok 96 brightness, 24-lb. bond. For waste calculation, BLI technicians collected and weighed all packaging and cartridges, drums, waste containers and maintenance items generated dur-ing a 150,000-impression test.




About Buyers Laboratory

Since 1961, Buyers Laboratory LLC (BLI) has been the leading global independent office-equipment test lab. In addition to publishing the industry’s most comprehensive and accurate test reports on office docu-ment imaging devices, each representing months of exhaustive hands-on testing in BLI’s US and UK labo-ratories, the company has been the leading source for extensive runnability testing on imaging media and consumables, as well as extensive specifications/pricing databases on MFPs, printers, scanners and fax machines. BLI also has a long-standing reputation for being the industry’s most trustworthy and complete source for quality testing services and global competitive intelligence.

In addition to testing over 200 office document imaging devices and related consumables annually for its subscribers, BLI provides consulting services to buyers and a range of private testing services that include document imaging device beta and pre-launch testing, performance certification testing, consumables testing (including toner, ink, fusers and photoconductors), solutions evaluations, and imaging media run-nability testing.

For more information on BLI, call (201) 488-0404, visit www.buyerslab.com, or email [email protected].

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