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If someone wanted to convert a Epson printer to print with white but has no need for a Flatbed what is the procedure? Just a rip program and a bulk ink system? I have been printing transfers for dark shirts using a plotter/ cutter to weed and spraying white textile ink onto the printed transfers as a backer layer with pretty good results. I now would like to step it up a notch with a CMYKW inkjet printer. With the new ink formulas the DTG manufactures are using the head clogging issues seems to have fallen by the wayside so I'm encouraged to try printing with white. Anybody doing DYI DTG got any advise?
I'm confused on what are you trying to achieve.
 

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I am a small time shop working out of my basement and I design art and print dark shirt transfers for other vendors. At present I do not use the thick rubbery opaque transfers opting instead to use the thin soft ones intended for white shirts and apply a white ink backer layer as a primer / mask. I have been doing this by hand with an air brush after cutting the pigment ink printed image out with a plotter / cutter. This is time consuming and I am seeking a faster more accurate way to apply this white layer such as you do with your DTG printers.
Because I'm printing on sheet goods I really don't need a flatbed. Ideally I would like to be able to print a CMYK or RGB color image in reverse on the transfer and then print a clone white image on top of that. This is why I am interested in the process you use to print in your homebuilt DTG printers. For me it's more efficient and much less expensive to send out a packet of transfers than a couple of cases of pre-printed shirts and my customers can apply them by size as needed. I realize DTG provides a much better product but I'm an Old School Iron On Guy trying to improve the process. Any knowledge you can give me on your inks, printing process and software would be greatly appreciated.
 

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With DTG inks it will not be possible to achive what you are looking for.

With UV maybe, I know some companies were making R&D on this.
I'm already using a textile DTG white applied with an air brush as the primer / backer layer. The inks aren't that important getting the printer to print the colors first then the white is the big issue.
 

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So you first apply the white to the transfer and then print it with a printer is that correct?
First I print the multi color image in reverse with an inkjet printer using pigment ink on a transfer for lights, then I stick a mask film on the back of the transfer and run it through my plotter / cutter, after that I spray the image with white textile ink from an air brush and after that dries I weed the image and heat apply it to a shirt removing the mask film and paper carrier sheet from the transfer. The white goes against the shirt and the multi color image shows thru the polymer transfer. The white acts like a primer to block out the dark color of the shirt. I would like to be able print the white accurately with an inkjet printer instead of having to use an air brush.
 

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I might test this. I also have RIP that prints both white and color in one pass.

How is the washability?

I now that Forever was making a paper for UV inks with similar process but it never worked correctly.
If I understand correctly with the DTG you print white first and then the color on top of the white. With a transfer it's the reverse, color first and then the white. Is your RIP program flexible as far as the print order? This is what I'm looking for is a program that will do that.
Wash ability seems to be OK I have test shirts I wear on a weekly basis. One of the suppliers I work with is developing a process that prints Sublimation ink onto a self weeding Laser transfer then you run it through a monochrome laser printer that has the black toner swapped out for white. I'm really looking forward to seeing this run.
 

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I use bulk cartridges, but I'm developing a bagged system for this but this is tricky with 3880, because of the pressure system.
Have you thought of using a pressurized bladder like the ones inside a soccer ball to push on the outside of your ink bags in an enclosed space. This could be hooked to a small, cheap air compressor with a regulator to maintain constant pressure.
 
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