Re: Hexachrome, which train are you on?
Re: Hexachrome, which train are you on?
- Subject: Re: Hexachrome, which train are you on?
- From: Dan Reid <email@hidden>
- Date: Mon, 29 Apr 2002 18:36:11 -0600
on 4/29/02 5:56 PM, email@hidden at email@hidden wrote:
>
>
In a message dated 4/29/02 6:04:25 PM, email@hidden writes:
>
< snip >
>
>
You must have Roland if printing CMYKOG, right?
>
> Or are you using a DisplayMaker XII or something similar?
>
>
C M Y K O G, count them. Six channels. Any Epson since the 3000 is capable of
>
that.
I didn't realize you could purchase Orange and Green for any Epson printer.
By the way you do know that Hexachrome Cyan etc. is not the same as inkjet
cyan -- radically different. I didn't know that Hexachrome inks were
available for the inexpensive Epsons. Does Pantone know this? They should if
you are getting good results with your orange and green combination.
>
>
> I am interested in how you are proofing CMYKOG with limited gamut CMYK or
>
> CcMmYK ink set-ups?
>
>
Have you done gamut comparisons for PressHexachrome, and Inkjet CMYK? Or to
>
put it in common sense terms: have you run into many colors in photographs
>
that were beyond the gamut of a dye inkjet on glossy stock? The only other
>
thing to hit is spot colors, which is why I said the choice is between the OG
>
for Pantones, or the Light C&M for photo smoothness.
Many times I run into situations were the inkjet printer can't print colors
of the source file. If you have BetterLight or PhaseOne scanning camera you
can easily record colors that outside of Epson printer/ink combination.
I also have built custom press Hexachrome ICC profiles. The sheet fed
Heidelberg MO(?) press with Hexachrome inks produced some of the best
looking output I have laid eyes on for a press. Not sure why your
PressHexachrome ICC profile has a color gamut within inkjet CMYK color gamut
but if does -- cool!
>
>
> True, not every image will benefit from the Hexachrome but how are you
>
> determining if the image will benefit using Hexachrome process. If the
>
> image
>
> won't benefit from Hexachrome printing then why not just use CMYK instead
>
> of
>
> trying to simulate six colors on a 4 color device?
>
>
You appear to be thinking in terms of final output to an inkjet. For press
>
proofing the very limited gamut of PressCMYK means that many images will
>
suffer, and that many Pantone colors cannot be accurately matched. So
>
Hexachrome has significant value for image gamut, and for avoiding extra
>
color plates to hit Pantones that CMYK can't reach. With the proofer, your
>
only job is to match the range of the Hex Press... or the parts of it that
>
are important for a given job.
>
>
>
>> The "something"
>
>> that you are missing is that PressHexachrome is needed because PressCMYK
>
> is
>
>> quite a limited gamut... for inkjets with their wider gamut the choice
>
> exists
>
>> of getting a few more of the Pantone colors to proof accurately by using
>
> OG,
>
>> or to get the smoother images by using the light C&M... few images actually
>
>> need the OG for gamut enlargement. If you want both at once, then yes,
>
> an
>
>> eight color device is your only choice.
>
>
>
> I still don't understand how you can simulate six colors on a 4 color
>
> device. The contract proofers that are certified by Pantone use Hifi 4/C
>
> sheets to achieve a color gamut as large as the Hexachrome process. Inkjet
>
> printers don't have a gamut as large as Hexachrome. If they did then why
>
> bother with the Hexachrome anyways?
>
>
PressHexachrome! Inkjets can being used to proof the PressHexachrome gamut
>
with whatever colors you choose to run in them... the fact that a given job
>
(say a newsprint webpress run of advertising material) is within the gamut of
>
a CMYK inkjet on a particular stock does not mean that it is within the gamut
>
of a CMYK web press on newsprint.
Huh? CMYK web press on newsprint has a wider gamut than the inkjet? You are
losing me here.
So you could proof that job in its totality
>
on a CMYK or CcMmYK inkjet, and print it in PressHexachrome for the added
>
color gamut that offers on press, to the otherwise weak color range of a
>
web/newsprint job. If you are talking about a cut sheet coated Hexachrome
>
job, with special wide gamut color images or lots of brilliant vector colors,
>
then using a CMYKOG inkset in you inkjet would be appropriate for proofing
>
that job.
Now you suggest printing PressHexachrome for more color vibrancy but the
inkjet can simulate the press? I am not following your thinking. I am
confused.
< snip da' rest >
I hope all are enjoying this thread!
--
Dan B. Reid
RENAISSANCE PHOTOGRAPHIC IMAGING
Color Imaging Solutions Provider
http://www.rpimaging.com | email@hidden
Toll Free: (866) RGB-CMYK [ 866-742-2695 ]
Local: (505) 471-4126
_______________________________________________
colorsync-users mailing list | email@hidden
Help/Unsubscribe/Archives:
http://www.lists.apple.com/mailman/listinfo/colorsync-users
Do not post admin requests to the list. They will be ignored.