- Joined
- May 29, 2007
- Messages
- 3,294
- Reaction score
- 1,912
- Points
- 333
- Location
- Ghent, Belgium
- Printer Model
- SC-900 ET-8550 +18100 WF-7840
yes it does exist, but this much more complicated and needs a 6 channel printer (for example: ET-8550) and you need to program each channel with a RIP (for example: QuadToneRIP) to drive each individual ink channel. And something to take into account: white ink is very difficult to work with, as it is prone to clog the nozzles. Most people using white ink prefer a cartridge based printer and after each session, you need to flush the ink channel with a conditioning solution to keep the printhead in good condition.
Even you could print white ink, the problem is the light yellowish or light coloured patches where the underlying metal shines through the layer giving a iridiscent reflection that tricks the sensor of the spectro to register the wrong value.
There is not a good solution, maybe first sublimate a white background on those cards and on top the target (double layer).....this mean you need an extra Epson printer (mind the nozzles: so flush after each usage) to print a white layer (using black ink cartridge: print a square completely black surface, but he printer uses white ink). So double sublimating.
Even you could print white ink, the problem is the light yellowish or light coloured patches where the underlying metal shines through the layer giving a iridiscent reflection that tricks the sensor of the spectro to register the wrong value.
There is not a good solution, maybe first sublimate a white background on those cards and on top the target (double layer).....this mean you need an extra Epson printer (mind the nozzles: so flush after each usage) to print a white layer (using black ink cartridge: print a square completely black surface, but he printer uses white ink). So double sublimating.
