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DORIS  How to judge premium color toner | ||
| Factor | Performance | |
| Color | Hue | color consistency |
| Saturate | vivid, clear | |
| Bright | very shining | |
| Blackness & Chroma | ideal value controlled around 1.48 | |
| Bottom ash | ideal value controlled around 0.05-0.06, above 0.06, the printing will be not clear. | |
| Defective rate | normal range between 5%-7%, beyond this range, this toner particles may become waste power, on the one hand, reduce printing pages, on the other, shorten the developer life time. | |
| DPI | if low resolution, the printing quanlity will be not clear, bad appearance. | |
| Fixing | fixing fastness standard above 90% | |
| Ghosting | double image is affected by conductivity and print medium | |
