RISO CZ-Type Black Ink (e.g., Part S-4877)
Genuine RISO ink intended for CZ series digital duplicators such as CZ100, CZ180 and CZ1860.
Typically comes in 800 ml bottles or cartridges with an internal chip or compatible fit.
Used for pushing ink through the stencil master onto paper in bulk duplicator printing.
One bottle can yield thousands of prints — often around 18,000–20,000 A4 copies from ~800 ml depending on coverage.