Ignore objects with constant alpha less than 1.0

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gigabeard
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Posts: 6
Joined: Thu Oct 10, 2019 5:36 pm

Ignore objects with constant alpha less than 1.0

Post by gigabeard » Thu Oct 10, 2019 6:15 pm

I am trying to build an action that converts all 100 K objects to a spot swatch, and ignore K objects less than 100.

The problem is Pitstop selects 100 K objects, regardless of their constant alpha. For example, we have a file built in Illustrator with a square that is 100% K, but the opacity of the object is 50%. The object will only print 50% K, but Pitstop detects it as 100% K.

I have some test files, but I'm having a difficult time attaching them to the post, the AI file is less than 800KB but still won't upload.

Please refer to the attached PNG file. This is a screenshot of Acrobat's built-in Preflight Profile "List transparent objects." You can see that Acrobat detected a "constant alpha" on the fill that is less than 1.0. My test file contains two squares that are detected as having constant alphas less than 1.0: one with 100K and 50% opacity, the other 100K with 37% opacity.

It is possible to detect these objects with Acrobat's built-in tools, but I don't know how to detect the constant alpha of objects with Pitstop. The closest I have gotten is "Select objects that have a clipping path," which selects the proper squares... but I don't know how to select the content within the clipping paths, or check if the clipping path has a constant alpha less than 1.0.


Any ideas on how to detect constant alpha less than 1.0? Or any other suggestions?
Attachments
TransparencyTester.png
TransparencyTester.png (159.38 KiB) Viewed 462 times

abailescollins
Advanced member
Posts: 235
Joined: Wed Apr 22, 2015 4:28 pm

Re: Ignore objects with constant alpha less than 1.0

Post by abailescollins » Fri Oct 11, 2019 2:26 pm

Here's one to have a play with.
it combines 100% K, alpha modes and blend modes, all of which would effect the 100% K
you can of course adjust the error message as well.

This is setup for fills, but a similar one should also be added for strokes.
Attachments
100% Black Check.eal.zip
(2.5 KiB) Downloaded 17 times
PitStop Product Manager @ Enfocus.
andrewb@enfocus.com

gigabeard
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Posts: 6
Joined: Thu Oct 10, 2019 5:36 pm

Re: Ignore objects with constant alpha less than 1.0

Post by gigabeard » Wed Oct 23, 2019 6:32 pm

abailescollins wrote:
Fri Oct 11, 2019 2:26 pm
Here's one to have a play with.
it combines 100% K, alpha modes and blend modes, all of which would effect the 100% K
you can of course adjust the error message as well.

This is setup for fills, but a similar one should also be added for strokes.
Thank you for the reply. I tested this, but it did not work as expected. Is there any way I can get my test files to you so you can see for yourself?

abailescollins
Advanced member
Posts: 235
Joined: Wed Apr 22, 2015 4:28 pm

Re: Ignore objects with constant alpha less than 1.0

Post by abailescollins » Thu Oct 24, 2019 1:36 am

Can you mail them?
andrewb@enfocus.com
PitStop Product Manager @ Enfocus.
andrewb@enfocus.com

gigabeard
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Posts: 6
Joined: Thu Oct 10, 2019 5:36 pm

Re: Ignore objects with constant alpha less than 1.0

Post by gigabeard » Thu Oct 24, 2019 5:27 pm

Email sent!

abailescollins
Advanced member
Posts: 235
Joined: Wed Apr 22, 2015 4:28 pm

Re: Ignore objects with constant alpha less than 1.0

Post by abailescollins » Tue Oct 29, 2019 3:31 am

Sent you an Action List to try.
PitStop Product Manager @ Enfocus.
andrewb@enfocus.com

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