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Question

Created a pdf by capturing webpages, but it fails preflight conversion to x/1a because it say I have transparent groups

Forum|Forum|7 years ago
March 10, 2019
4 replies
1365 views

Created a pdf by capturing webpages, but it fails preflight conversion to x/1a because it say I have transparency groups. I know I got this to work 7 years ago, but I can't reproduce the steps and success on this newer MAC.

I don't understand what transparency groups are and how to eliminate them.

Advice very welcome as I had hoped to send the pdf of the book off for printing.

This topic has been closed for replies.

T

Test Screen Name

Legend

I see what you mean. Happens on Convert .. Analyse and fix, and on Standards > Convert. It looks like a bug in the current Acrobat DC.

P

pjt11Author

Known Participant

Just got the latest acrobat DC. Problem persists. Indeed, it is more mysterious now -- I successfully flatten, but then preflight still tells me I have transparencies. Any further advice to help?

T

Test Screen Name

Legend

That was what I was wondering - the message sounded more like it belonged in the checker than the converter.

T

Test Screen Name

Legend

The PDF/X-1a converter should flatten transparency groups. What is the exact message in full please?

P

pjt11Author

Known Participant

thanks for response. message:

pdf not compliant with pdf x/1a.

then

transparency used (transparency group)

then many entries of the following kind:

Page 1 Gill Sans semi-bold 24.0 true type embedded as a subset overprint:off

Abambo

Community Expert

You’re checking for compliance... you’re not converting to PDF/X-1a!

ABAMBO | Hard- and Software Engineer | Photographer

Abambo

Community Expert

Transparency is not allowed in PDF/X-1a. The question is: why do you need X-1a?

If you need X-1a, you need to flatten first.

It worked probably 7 years before because you used a PDF level that did not allow for transparencies anyhow.

ABAMBO | Hard- and Software Engineer | Photographer

P

pjt11Author

Known Participant

Understand that transparencies are not allowed in pdf x/1a. I am asking for help to get rid of them (given that I don't know what they are or how I got them.)

Lightning Source asks for files as pdf x/1a.

I asked preflight to fix errors so I am not sure why it didn't flatten out the transparencies.

I suspect you are right that the pdf maker of 7 years ago did not create the transparencies.

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