I really need help with this. My colleagues and I use Adobe Bridge to create contact sheet PDF files for client approvals. We place hires transparent PNG files, and export to PDF withh various page layouts (i.e. different numbers of images per page), depending on the client.
In the more recent versions of CC (newer that 2018), I have found that hte file size of these PDF files is usually prohibitively big (as we want to be able to emails them to clients with limited bandwidth, and also not clog up our email storage). Instead of being around 1MG in size (which is what I can produce when re-exporting the PDF from InDesign (placing the Bridge-created PDF file into InDesign and exporting a 300dpi interactive PDF), the PDFs from Bridge range between 5 and 30 MG in size.
This happens regardless of export image quality settings.
Optimising the files after the cae like I do in InDesign is not an option (nor is it viable for us to optimise through Acrobat DC, as this compresses image quality too much), as we have only one full license and the rest of the licenses are Photography plan (Bridge, Lightroom and PS only).
What else can I do to fix this problem?
I know people who use older versions of Bridge as a workaround, but we cannot installl any versions older than what is currently available for download on CC.
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I have now discovered that if I use the Preferences setting to NOT preserve transparency for the images, this makes the output file a lot smaller. Any other ideas about how I could improve on this?
So glad you posted this answer, thanks matey 😃
This trick Helped almost cut my PDF files in 1/2!
Really appreciate the insight.
Chris Lo Bue Photography
Good catch on transparency.
Do you have Photoshop?
If the images are of normal photography kinds of things (faces, houses, parties, things like that), than PNGs will be larger than if save as a JPG.
Also just be aware that images just have a lot of data and the more data the more storage space they will take up. However, if the images are of text, shapes, and things like that, than PNG format is better because the file size will be smaller and there will be no image degredation.
Probably what you need to do is to take one of these images, open it up in PS, and press Command/Control-Option/Alt-Shift-s (three fingers from one hand, one from the other). In the Save for Web... interface you can see the image on the left and on the right you'll see a dropdown (#1) to select the desiered format. If you chose JPG, to the right of that you'll see (#2) the option to set the amount of compression — do not set this any lower than 70. The greater the compression the more distruction to the image. [Note, after I took this screenshot I noticed that it was set to 60, I had a specific reason to set this there, so do as I say, not as I do! ;>)]
You'll notice in this image I'm showing "2-up" this lets me see the original and the result of the selected format. At #3 you can see the original file size and at #4 you can see the results of the image format. In this case there is a 10x decrease in file size.
Hi Gary. Thanks for your response.
The issue here is that I do not want to have to make changes to the files before placing them in Bridge. The PNG files are the correct size and format for our use, it's just when making a contact sheet style PDF that the files were too large. But discovering the transparency issue has fixed my problem.
I now have another issue though, and can't figure out where I am going wrong.
There are 4 or 5 of us needing to make files in this way, all on different machines, often running different versions of the software. We have a standard colour setting for RGB and CMYK which we use in PS, and this setting should be available in bridge to choose so that we can synchronise the apps. On some of our machines it is available and on others not (even though they are they same version of the programs). More signficantly, even when using the same profile, we are getting different result when exporting to PDF. I don't know why.
The working profile we use is sRGB (because the files will eventually be used online), but the PNGs don't embed this profile (they seem to be able to embed Adobe 1998 only). So we save them without a profile embedded and then use the same profile in Bridge, which, if I understand it correctly, will display the images in the PDF with this profile applied. But for some reason, one of our machines is creating PDF files with much brighter images than the others (even though the same settings are used).
Any bright ideas?