Print Setting

[Priyantha]

I produce a magazine to get printed on MagCloud (herein after MC)

They maximum file size for a PDF file 8.5x11 is 300MB.

I exported a 68 pages PDF with setting

JPEG Compression 98, Above DPI 325, Pre set PRINT PDF, Final product ended up with 310 MB which is too big file for MC to accept.

Then I altered the setting (mainly JPEG Compression 79), I had a pdf just under 300MB.

My questions, Does, having reduced JPEG Compression around 75ish, negatively affect the final product, PDF.

What actually Above DPI value does, and how the variation of that value affects the final product? 

Thank You @Dan C

 

 

 

[R C-R]

8 minutes ago, Priyantha said:

My questions, Does, having reduced JPEG Compression around 75ish, negatively affect the final product, PDF.

Note that the setting is quality, not compression, & that the greater the compression, the lower the quality. This is because normal JPEG compression is lossy, & that involves sacrificing fine details to allow greater compression. However, moderate amounts of compression generally do not affect the appearance of the image unless it is full of very fine details.

There is no one setting that will provide the best compromise for every image so a bit of experimentation to find a 'good enough' setting may be required.

[Priyantha]

1 minute ago, R C-R said:

Note that the setting is quality, not compression, & that the greater the compression, the lower the quality. This is because normal JPEG compression is lossy, & that involves sacrificing fine details to allow greater compression. However, moderate amounts of compression generally do not affect the appearance of the image unless it is full of very fine details.

There is no one setting that will provide the best compromise for every image so a bit of experimentation to find a 'good enough' setting may be required.

@R C-R Thank you, I assume this is your opinion and I agree, and I understand this already. I posted this to have a more knowledge on Manage Presets including  What is  Above DPI mean, what is Resamplar, Should I tick Downsample Image or not ?  At least if you could shared a video tutorial from knowledgeable source, that would be a great help. 

[stokerg]

Hi @Priyantha,

There is a rundown of the options for exporting to here: https://affinity.help/photo2/English.lproj/pages/Sharing/export.html

10 hours ago, Priyantha said:

What is  Above DPI mean

It means any images over the DPI in that field will be downsampled

10 hours ago, Priyantha said:

what is Resamplar

This is the method used to resample the image.  

10 hours ago, Priyantha said:

Should I tick Downsample Image or not ?

Really depends on what's in your file and what the DPI of your images are.  When it comes to anything to do with printing, it's really best to follow the advice from the company who will be doing the printing, as they will have their own preferred type of PDF and as long as you match that, you should be good!

But the best advice I can give for printing anything, get a proof copy printed first so you can it for issues, before committing to the final print run.

[Priyantha]

On 5/25/2023 at 10:26 PM, stokerg said:

Hi @Priyantha,

There is a rundown of the options for exporting to here: https://affinity.help/photo2/English.lproj/pages/Sharing/export.html

It means any images over the DPI in that field will be downsampled

This is the method used to resample the image.  

Really depends on what's in your file and what the DPI of your images are.  When it comes to anything to do with printing, it's really best to follow the advice from the company who will be doing the printing, as they will have their own preferred type of PDF and as long as you match that, you should be good!

But the best advice I can give for printing anything, get a proof copy printed first so you can it for issues, before committing to the final print run.

@stokerg Thank you for your explanation. much appreciated.