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Re: 3rd party inks

Ray & Bernie,

As I understand it, one of the main reasons for inventing the sRGB color
space as a universal standard, is that the sRGB profile doesn't then have to
be attached to the image file. The operating system ICM2 by default assumes
sRGB unless told otherwise. So everyone saves the bandwidth that the profile
would use, if it had to be attached to all jpegs etc (it would often be
bigger than the image).

Since many scanners, printers, digicams use the sRGB standard, and most
monitors approximate to sRGB, it makes sense for most people to use it.
Those on this list are clearly not 'most people', and many use custom
profiles to squeeze the last bit of color out of their printer/ink/paper
combination. But I doubt very much if 'most people' could tell the
difference between an sRGB managed print, and a custom profile print.

Bob Frost.

----- Original Message -----
From: "Bernie Epstein" <bepstein@comcast.net>

> Ray:
> You may find the following excerpt helpful. It's from a review of the
Nikon 4000
> ED by Steve Hoffman at http://www.sphoto.com/techinfo/scs4000.html#Color.
> Bernie Epstein
> sRGB is still a rather new standard and some folks are not comfortable
with it.
> The following information is a quote and was taken from Adobe Photoshop's
> Management technical support page. The link to this information is no
> available. However, I'll print the information and hope that Adobe won't
> after me..;^)
> "sRGB is a standard promoted primarily by Hewlett-Packard and Microsoft.
> reflects the standards for HDTV broadcast (Gamma=2.2, Primaries=HDTV,
> Point=6500K).
> One of the reasons to use sRGB is that Hewlett-Packard is promoting a
> in which hardware devices such as scanners, non-PostScript printers, and
> browsers will be optimized for RGB data in the sRGB space. If you are
using such
> devices, sRGB will provide the simplest workflow.
> sRGB reflects the characteristics of the average PC monitor. If you are
> producing graphics to be viewed on the Web, sRGB will reflect what most
> see. The downside to sRGB is that it has a limited color gamut and cannot
> represent as many colors as other color spaces. It is not a good choice
> professional prepress users since too much of the CMYK gamut lies outside
of it.
> Microsoft and Hewlett-Packard think sRGB solves a lot of problems with
> un-calibrated RGB. Personally, I find sRGB perfect for web imaging and
> on my PhotoSmart and Canon S800 photo printers. In fact both of these
> are optimized for sRGB input. I've been told that the Epson photo printers
> also optimized for sRGB. It is best to know in advance the color space
> intended output device is optimized for before you prepare you image for
> scanning. Adobe's Photoshop will allow you the option of opening an image
> your working color space space and profile while temporarily discarding
> embedded profile. You can also 'convert to profile' after your image is
> This Photoshop feature allows you to scan and save in fairly wide color
> like Adobe RGB 1998 or Bruce RGB and convert it later to any number of
> equal or lesser gamut color spaces or profiles.

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