Re: Epson Stylus Pro 9600 Extrachrome
Re: Epson Stylus Pro 9600 Extrachrome
- Subject: Re: Epson Stylus Pro 9600 Extrachrome
- From: neil_snape <email@hidden>
- Date: Fri, 12 Nov 2004 18:54:21 +0100
Title: Re: Epson Stylus Pro 9600 Extrachrome
on 12/11/2004 18:37, Roger Breton wrote :
> The problem with HP's pigment inks (to compare apples with apples --
> Ultrachrome inks are pigment-based after all), if I recall, is their NOT
> being pigment-based but rather dye-based, in actuality?
>
> That is what I was told by an HP rep at a show when I asked about the
> stability of the new ink used in the HP130. True or not? I did not have my
> spectro to test this with me -- I don't walk around with a 530 in my pocket
> all the time.
>
> That HP rep said to me that the inks used in the 130 were "light-fast",
> meaning resistant to fading, but stable out of the printer.
>
> I don't know what time it takes for those new HP inks to actually stabilize
> but that's bugging the hell out of me. Whereas with Epson UC inks, at least,
> they are stable, colorwise, almost right out of the printer.
Dye inks. About as good as anyone has done with dyes for stability. If you want it to be archival it must lay in the layer of polymer to protect it against oxidation. The Glossy doesn’t dry quickly at all on swellable papers. On nanoporous as per Canon it dries quickly.
I measured the inks over time and don’t see that nice Epson 0.5 dE figure anywhere near the 1 hour mark. Long term stability is as stated but short term?
It’s stable short term but you have to know that the glycol is going to evaporate. When it does it changes the surface transparency so there is a shift in values. I can only assume that the inks themselves are very stable yet I do see the L values moving due to the surface difference. As well one should measure these with a non touching spectro like a Spectrotable, or the next X-Rite Pulse.
So the UC inks are stable quickly as the pigments are the surface, where as the HP inks are stable , yet the surface changes. How’s that for a scientific sounding guess?
--
Neil Snape photographer Paris France email@hidden http://www.neilsnape.com
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