We measure what manufacturers claim. Toner yields, drum lifetimes, fuser temperature drift — pulled from real devices in production environments, not lab clean-rooms.
| Device / Supply | Claimed | Measured | Coverage | Delta | Method | Notes |
|---|---|---|---|---|---|---|
|
Konica Minolta bizhub C300i
TN-328K (Black)
|
28,000 | 27,140 | 5% | -3.1% | ISO 19798 | Yield variance within spec. C300i fuser calibration affects measured coverage at 5%. |
|
Konica Minolta bizhub C300i
TN-328C (Cyan)
|
28,000 | 26,880 | 5% | -4% | ISO 19798 | Slightly below spec. Color channels show more variance than black on this model. |
|
HP LaserJet Enterprise M608
CF237Y (81Y, 25K)
|
25,000 | 24,310 | 5% | -2.8% | ISO 19752 | Tested across 3 cartridges; 24,100–24,520 page range. Consistent lot. |
|
Brother HL-L9310CDW
TN-910BK (Black, 9K)
|
9,000 | 8,740 | 5% | -2.9% | ISO 19752 | Brother mono yields are among the most consistent tested. Minimal chip communication issues. |
|
Ricoh MP C3004
Type MP C3004 Black
|
29,000 | 27,650 | 5% | -4.7% | ISO 19798 | Ricoh yields show consistent 4–5% shortfall in field conditions vs. rated spec. |
|
Xerox VersaLink C405
106R03532 (High-Cap Black)
|
10,500 | 10,190 | 5% | -3% | ISO 19752 | Solid performer. Smart chip accurately reports remaining pages within ±2%. |
| Unit | Rated (pp) | Measured (pp) | Coverage | Delta | Field Note |
|---|---|---|---|---|---|
| Brother DR-730 | 12,000 | 11,820 | 4.2% | -1.5% | OPC fatigue evident at 11,500 pages under high-humidity conditions (>60% RH). |
| HP CF219A (19A) | 12,000 | 11,550 | 5.5% | -3.8% | High-coverage (5.5%) degrades drum 12% faster than rated at standard 5%. |
| Konica DR-512K | 60,000 | 58,400 | 5% | -2.7% | Commercial-grade drum. Measured via service menu page counter over 14 months field use. |
Yield ratings are specified at 5% page coverage. Real-world print jobs — particularly in legal, marketing, and architecture — average 6–15% coverage. The cost-per-page difference is non-trivial.
These figures are based on the HP M608 high-capacity cartridge (CF237Y, rated 25K pages at 5%). Methodology: variable coverage test pages, 100-sheet sampling intervals, weight-based toner depletion measurement.
Result: a workflow running 10% coverage pays 2.06× more per page than the same device at the rated 5% baseline. Most MPS billing doesn't account for this.
| Coverage | Bar | Cost/Page |
|---|---|---|
| 3% | $0.0021 | |
| 4% | $0.0028 | |
| 5% | $0.0035 | |
| 6% | $0.0043 | |
| 7.5% | $0.0054 | |
| 10% | $0.0072 | |
| 15% | $0.0108 | |
| 20% | $0.0144 |
At 5% ISO coverage, HP M607 measured 22,940 pages vs. 23,000 rated (-0.26%). At 7% field-average coverage, yield drops to ~16,390 pages — a 28.7% reduction. Significant for high-graphic legal/marketing output.
Post-20190901 firmware, 14 of 17 third-party cartridges tested trigger "Non-HP Cartridge" error on LaserJet Pro M402/M403/M404 series. Only 3 (Katun, Clover, LD Products) pass authentication. Genuine HP shows no regression.
In environments exceeding 80,000 pages/month, Ricoh MP C3004 fuser thermistors show measurable resistance drift after 18–24 months. NTC thermistor at 25°C drifts from nominal 100kΩ to 112–118kΩ, triggering marginal SC 541 events. Replacement at 18-month intervals recommended in high-cycle deployments.