POSink Dye Ink for EPSON 1400
The EPSON 1400 is a pigment ink printer so you have to convert to a special DYE black ink for positives. POSink is the best dye based ink for screen making positives on the market. It is specially formulated for printing on coated clear film and designed to dry quickly, resist scratches and have excellent UV blocking characteristics. POSink is a safe, non-toxic water based textile ink which is solven and odor free.

Using these cartridges will not void your warranty from Epson.

Lawson recommends Water Proof Inkjet film

IMPORTANT:
There are eight ink cartridges in this printer. Install the FastINK/POSink instead of MATTE BLACK because when the printer starts for the first time it will write the cartridge information to the firmware. It requires an EPSON technician; many purge cleaning cycles & wasted ink to clean the tube system of pigment ink.