Image Transparency Issues with 100% black backgrounds

[RedDejavu]

Hi,

I have a bit of an issue. Whenever I use 100% background with transparent images the area around the images gets changed to rich black or RGB space (I think) even though the image is converted to CMYK . When I open the pdf in other programs like Illustrator all seems fine.

Transparency options are set to high quality, Preferences allow overprint black at 100%. Colour settings are synchronised and all displays properly when viewing PDF but as soon as it goes to printers the box appears, that also applies with shadow effect.

[rob day]

It looks like you are using he default [Black] swatch as the fill for the Indesign frame, which wouldn't match the photo's background. You can use the Eyedrpopper tool to sample the photo's CMYK black and use it as the frame's fill. The color of [Black] depends on the document's assigned CMYK profile. Here the image has been converted to Coated GRAcol and the assigned document CMYK profile is the same

[RedDejavu]

Thanks Rob, but the image I have attached is from the printers, in Indesign the image is a transparent PSD in CMYK, just to add this only occurs on black backgrounds, any other colour looks fine.

Also the solution I found is to fill in the frame with 100% black and then it works, this on the other hand would not be the case when using gradients or image lands on two different colour backgrounds.

[rob day]

I understood that you were showing a printed piece. Is the print from an offset press or some kind of digital composite printer?

If you are delivering a PDF to the printer, what PDF preset are you using and have you checked the output values in AcrobatPro's Output Preview to see if they match?