Luminous Landscape Forum

Raw & Post Processing, Printing => Colour Management => Topic started by: Tonka on January 18, 2015, 12:52:39 pm

Title: Black point compensation: Proofing versus print
Post by: Tonka on January 18, 2015, 12:52:39 pm
Hi all,

Here's the situation:

Epson SP 3800
PS CS6
Calibrated screen (Spyder3)
Printed on Olmec glossy or Epson semi-gloss papers
Matching paper profiles.
Relative Colormetric.

With soft proofing, BPC toggling makes on screen picture considerably lighter/brighter (on) and darker (off).
Print matches screen softproof with BPC turned off.

There's actually hardly any noticeable difference between printing with BPC on or off.

Why is that? And why does the BPC toggling in soft-proofing make such a big difference?
Title: Re: Black point compensation: Proofing versus print
Post by: digitaldog on January 18, 2015, 01:00:32 pm
There's actually hardly any noticeable difference between printing with BPC on or off.
In a nutshell, keep it on all the time. It either aids in the conversion due to an issue mapping source to destination black (for some profiles) or doesn't do anything at all.
Title: Re: Black point compensation: Proofing versus print
Post by: Tonka on January 18, 2015, 01:43:23 pm
In a nutshell, keep it on all the time. It either aids in the conversion due to an issue mapping source to destination black (for some profiles) or doesn't do anything at all.

Hi Digitaldog,

For printing, I agree.

But for proofing, I notice a huge difference on screen, when I toggle it on and off in the proofing profile. When turned "off", the screen to print match is the best.

What I'm wondering is why the big diff on screen, but not on print? And when both on, there's a mismatch.
Title: Re: Black point compensation: Proofing versus print
Post by: digitaldog on January 18, 2015, 01:54:42 pm
Could be the preview portion of the output profile for one. Could be something going on within the display path. Hard to say.
Title: Re: Black point compensation: Proofing versus print
Post by: Tonka on January 18, 2015, 01:56:54 pm
Ok. thanks for the reply.

Happens with Olmec and Epson profiles.

Anyway, the current setting works. I'll keep it that way.