Review on V4INK 4-Pack Compatible Toner Cartridge Replacement for Canon 104 CRG-104 FX-9 FX-10 Toner Cartridge | Works with Canon Imageclass D420 D450 D480 MF4150 MF4350D MF4270 MF4370DN MF4380DN Printer by Vinay Mickel

Contrast is excellent, chip reports low toner in good time before catastrophic data loss occurs, I think the contrast improvement is due to larger toner particles than OEM but the toner runs out much sooner than the original. The last drawback is quite forgivable given the low cost of these cartridges. What I can't forgive is that while most faxes print fine, some faxes that you may be violating the 1/4 inch safe-distance rule will deposit toner beyond the usable area of the selenium drum. . , and glue the edges of the printed pages together. When this happens, each edge of the page after these faxes sticks to the melted toner and folds into the corner, which can result in a paper jam in the tray. What is the main disadvantage? The scope of selenium is slightly out of specification. Its selenium surface is slightly narrower for some reason. I suspect an error in the swaging process of the drum itself, which is part of the way the drum is shaped to set the end gears for the mechanism. This technical deficiency causes an out-of-spec taper that reduces the potentially usable surface area of the selenium. Another possibility is that the manufacturer simply trimmed the area on the drum where they apply selenium. I think this is the first scenario as too much toner sticks to the edges and multiple pages fold around the corners. Selenium needs to be applied to those "non-standard" gathered edges. The main disadvantage.