The color of the ink is PURPLE.
Paper Saver 664 ink is compatible with printers that use Epson 664 ink. The ink comes in a bottle for filling the ink tank in the printer. You should start using Paper Saver ink with a new printer that has clean, empty ink tanks. If you put Paper Saver ink in printer that had regular ink in it before, the old ink will contaminate the Paper Saver ink so that it is no longer self-erasing. The mixture of inks will typically clog the nozzles in the printer and make it unusable.
Paper Saver ink goes in the tank marked “BK”, the tank for black ink. If there are two BK tanks add ink to both. Also add Paper Saver Ink to the color tanks (C, M, Y) to at least the 2nd lowest fill line so the printer can perform its priming and cleaning functions properly without contaminating the Paper Saver ink with regular ink. Each bottle contains 70 ml of ink. We recommend at least 140 ml of ink for filling the tanks in a new printer for the first time.
Compatible Epson printers
The ink works in ordinary inkjet printers, using ordinary paper. The printing process itself is unchanged, but after the use the paper is not discarded or recycled. Instead the paper is set aside and the printing erases itself. Carbon dioxide in the air is absorbed by the ink and chemical reactions take place that make the ink colorless. When this self-erasing is complete, the paper is indistinguishable from new paper and can be used again exactly the same way new paper can be used. When the paper eventually becomes wrinkled after many uses it can be recycled as normal.
The color of the ink is PURPLE.