In an old print shop, hold the ink bottle to fill a cartridge while pressure builds and flow accelerates the longer you keep pressing. Release so the ink level lands inside the tick marks; overflow or a short fill fails the press job. Higher levels require two stacked chambers filled in sequence with a careful pause between each release. Clear three stages by reading pressure and band timing together. Dark violet tones, English labels, and accelerating flow make a tidy hold-to-fill workshop game with rising skill demand.
Hold the ink bottle to fill; release when the cartridge hits the band.