Printing onto transparent - dpi issue?

[radlin]

Firtsly please excuse a newbie posting a thread straight away, but searching for some help with a current project.

I'm looking to replicate some coloured images printed on transparent paper, which are then used via an LED to project an image. The images themselves are only 13mm and although I seem to be getting a fair amount of clarity there appears to be what I can only pressume to be tiny pin hole gaps in the print, which is allowing light to pass through printed areas eg black/blue giving a speckled effect. I can only assume its a dpi problem (we've tried upto 1200dpi thus far). Samples of images that came with the projector lights do not suffer the same issue. Does this sound a dpi, media or print method (laser/inkjet) issue?

Help appreciated.

 

[EdwardB]

You are actually trying to replicate a traditional photographic projector slide, with a printer... the problem you will experience is a printer moir pattern combined with a digitized image. I actually have no idea what would be the best method "in house" to make them... I would recommend contacting a good local pro-photo lab that has a digital-to-slide maker. They can probably re-size the image, on the slide itself, to get your 13mm dimensions

 

[radlin]

Thanks Edward. It's not though a slide as such its an image that an LED light is shone through to project an image/logo as per -



But I'm getting tiny fleks of light through some of the printed areas

 

[goalpdl]

Just to clarify, What material are you using to print on?

 

[EdwardB]

It's not though a slide as such its an image that an LED light is shone through to project an image/logo

that by definition is called a slide (if you are in the photo industry) or "transparency", same thing

 

[radlin]

Thanks Richard, so I'd need a slide printing specialist?

 

[gordo]

Thanks Richard, so I'd need a slide printing specialist?

A dye sublimation printer might also do the job. Something like this:
VuPoint Solutions Photo Cube Compact Photo Printer IP-P10-VP B&H

They use dye sublimation thermal imaging to transfer color from a ribbon of ink rather than by spraying it on. The images are therefore formed in continuous tone rather than by dots. You need to find one, or a photo lab, that can print onto clear material.

best, gordo

 

[radlin]

Thanks Gordo. I'll research them.