Why does the McCue – Cartridge Expert use the deep vacuum method to refill the cartridges?
Most modern inkjet cartridges use a reticulated polyurethane foam core to help meter the ink through the cartridge. When the ink has run out, this core is full of micro-pockets of air that can’t be displaced by forcing ink in through the nozzle or squirting ink in with a syringe. The only way to remove the air pockets is through deep vacuum refilling. Brand new inkjet cartridges are initially filled in a deep vacuum by the OEM and this is the way that the McCue – Cartridge Expert refills them. The only way to achieve the high page yields and print quality customers demand is by completely removing the old ink and air in the cartridge first. Nozzle and syringe refilling methods are able to squirt large amounts of ink into a cartridge but much of that ink is not usable and remains in the top strata of the foam core, which will cause the cartridge to fail prematurely.
