I am using Lexjet Water-resistant satin cloth on my HP DesignJet Z3200 to make lamp shades. See my site Photo-Lamps.com for examples. The only way I have found to get enough ink for dark blacks and saturated colors from back-light is to print twice by rewinding the roll to the same starting point, with the problem that registration is not always good. I have tried the HP profiles for HP Transparency Film and for other media such as canvas that take a lot of ink and they all give me much less backlit density for blacks than double the ink. Surely there must be a way to modify the printer calibration, driver settings, Qimage settings, and/or ICC profiles to get double the ink. Any ideas?
David
Two sheets printed with one blurred, mounted on top of one another, blurred one reversed at the back. Lack of density is not cured by a custom profile, the media preset with the highest load of ink on the Z3200 does not cure it either. Sure a custom profile could improve the two sheet sandwich color reproduction on top of that but at least you get the density. With the advantage that when the lamp is off the image still looks nice in reflected light, not too heavy then. In printing large backlit posters this method has been widely used on offset printers but then by printing the backside of the poster sheet, register is easier on an offset printing machine than with fabrics on a roll inkjet printer. A flatbed inkjet printer + a temporary frame for the fabric might do it on one piece of fabric .
An idea; Heavy paper sheet printed with the reversed image, aligned to register tabs at the front of the printer. Add a mild spray glue on that sheet. Put the cloth on the sheet and print again with register tabs at the front of the machine. Reverse the cloth after drying that the image fits correctly on the already printed reversed paper image (lightbox underneath if needed), print the reversed image slightly blurred again, you could even vary the density to get less obvious alignment failures and enough total density.
Met vriendelijke groet, Ernst
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