Inkjet printers can be used as a replacement for a high priced imagesetters and low quality laser printers. Epson's use a room temperature mechanical, piezo technology of precise electrical pulses that cause the ink reservoir wall in the head to compress, projecting ink through the nozzle. Programmers can also control the exact placement, size, and shape of each dot then shape with the millions of ink droplets they eject in each square inch. For screen printing, we need a one color printer, not an 8 color printer.RIP programmers can increase ink deposit to make the transparent ink designed for CMYK printing of multi-color photographs opaque enough to block UV light. Canon and HP printers use thermal heads that heat the ink to 500F over and over, producing a vapor bubble in the ink reservoir (bubble jet). When the ink expands, droplets are ejected through the nozzle. This cannot be increased with RIP programming. One of the side effects of the high heat is that the cooling phase alters critical nozzle alignment. To make screen printing positives with an inkjet printer, you must have an absorbent coating on clear film. Ulano Pigment Inkjet Films are designed to make positives. Dye inks are 100% liquid and can be absorbed by a swellable coating like the gelatin in indirect stencil films. Pigment inks require a micro porous coating with microscopic cavities that can absorb the resin coated pigment particles with natural capillary action. Ulano Pigment Inkjet Film is compatible with dye or pigment inks.
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