Epson T320 Standard Capacity Ink Cartridge - PictureMate PM-400

The Epson T320 is an OEM ink cartridge engineered specifically for the PictureMate PM-400 photo printer, delivering a four-color CMYK ink set in a water-based archival formulation. The rated 1,000-print yield at standard 4x6 output provides a concrete cost-per-print baseline — approximately the same cartridge set cost per print as a commercial photo lab, without the turnaround time. Water-based inks are the dominant chemistry for consumer photo printing because they reproduce a wide color gamut with smooth tonal gradations, and the archival-safe formulation means the dye compounds are stabilized against UV degradation and oxidation. Print longevity under controlled storage conditions is measured in decades, not months, which matters for photos intended for albums or framed display.

The T320 is purpose-built for the PM-400 platform — Epson's nozzle arrays, ink delivery pressure, and color management profiles in the PM-400 driver are all calibrated around this specific ink chemistry. Using OEM cartridges in a dedicated photo printer like the PM-400 also preserves print head warranty coverage and reduces the risk of nozzle clogging that can accompany third-party inks with different viscosity profiles. For the user running occasional 4x6 print batches — family photos, event prints, portfolio reference prints — the T320 delivers consistent output without the variables introduced by aftermarket alternatives. Standard capacity is the right choice for moderate use; users who run the PM-400 in high-volume sessions should monitor yield and consider purchasing in combo packs to minimize per-cartridge overhead cost.