Problem printing transparent .png's

In the printer settings, go to printqualtity, change imgae from vector to grid.

That did the trick for me. 🙂

I am having this same problem. I am placing .png file into illustrator and they end up with a light background around the images. the file looks fine on screen, but when printed it is leaving a light background. Why is this happening?

The problem is that when I print (either from PDF or directly from Indesign)

This question has come up before.

With composite printing it is likely a problem with how the print driver handles the transparency or color management. Try exporting a PDF with the Output tab’s Destination set to Document RGB, and then when you print in Acrobat check Print As Image from Advanced pane.

This may be too simple of an answer, and I'm newer to design as well, I had this problem all the time and I couldn't figure it out.  For things as simple as advertisements and posters, I just export my file as a JPEG then pop it into a new document and that got rid of all the funky foggy boxes around my PNG's. 

It is absolutely amazing how these threads keep rising up from the dead.

A few facts that I would like to point out and/or reinforce here.

(1)     Although it is true that a .PNG file may only be RGB colors or grayscale and are limited to 8 bits/colorant, the format does indeed support ICC color management and live transparency although not all applications producing and/or consuming .PNG files can handle one or the other.

(2)     Adobe Photoshop can save .PNG files with their respective ICC profiles and with live transparency. Adobe InDesign can properly open and place .PNG files with ICC profiles and live transparency.

(3)     Once a file is placed into InDesign, quite frankly, it doesn't make a bit of difference what the original format was when output (printing or better, exporting PDF).

(4)     Although not typically used for photography, other than not supporting Photoshop layers, CMYK and spot colors, and more than 16 bits/colorant, the fact is that a raster image in either RGB or grayscale saved as a .PNG file will render no differently than a .TIF file saved with lossless ZIP or LZW compression (or no compression). Obviously, you won't get the compression that you might get with JPEG or JPEG 2000 compression.

(5)     Due to its simplicity and compression characteristics, .PNG is often used for screen shots.

Bottom line is that .PNG often gets a very undeserved bad rap based on lack of knowledge and/or snobbery as opposed to fact.

          - Dov

You're using the wrong file format for print. PNGs are designed for on-screen viewing.

Open them in Photoshop and resave as PSD or TIFF files.