Digital BW, The Print

Op 25-11-2010 17:56, Paul schreef:
> Ernst Dinkla<edinkla@...>  wrote:
>>
>> ...will that also mean a return to gelatine/PVA coated papers to
>> get the optimal conditions for the "dye" inks?
>
> I'm not sure what all the consequences might be.
>
> I'm following the http://www.aardenburg-imaging.com tests closely.
> The Canson Infinity Baryta Photographique results suggest that type
> of coating might be something to consider.
>
> Given the predominance of pigments for serious printing, I'm guessing
> the paper R&D may have been geared in that direction at the expense
> of the dyes.  On the other hand, with the dry labs taking over the
> photofinishing, hopefully the heavy hitters will refocus on that
> market to get their longevity ratings up.  (The dry lab dyes are the
> source for this.  Even if the companies try to stop direct sales,
> imagine trying to police all of those photofinishers.)
>
> While the mordants in the receptor coatings are going to be one
> issue, another issue that is more directly relevant to the dilution
> base is the coupling agent(s) that are most appropriate.  It looks
> like the glycol ethers
> (http://www.dow.com/PublishedLiterature/dh_0032/0901b80380032bc8.pdf?filepath=oxysolvents/pdfs/noreg/110-00965.pdf&fromPage=GetDoc)
> may accomplish several functions in such a mix.  The ratio of a
> couple different types may allow adjusting several parameters, such
> as keeping the printer head moist, viscosity, cleaning, surface
> tension and coupling.
>
> I have not give much thought to toning, but I believe dyes do not
> have the separation issues that we ran into with pigments.
>
> At any rate, I'm not sure where this effort will lead.  The first
> thing is to start slow and just see how the black only dyes compare
> to Claria and the glossy pigments (like HP PK) that we have.  I have
> no doubt that the HP PK is more stable, but it sure would be nice to
> get rid of the bronzing for my cards and brochures.
>
> Paul www.PaulRoark.com

Like in more cases we must have watched the same developments. The dry
minilabs got a lot of attention on the Photokina 2008. I didn't check
them this time.

I was looking for the same bulk dye inks and smaller paper rolls but for 
color prints with a lower life expectancy and price than the larger 
pigment prints from my wide formats. I think you can not expect as wide 
a choice in media that the pigment ink printers have now. The minilab 
market is different.

The last Photokina showed another development, art papers for ecosolvent 
printers. The shops that print the cheap canvas with ecosolvent printers 
are now interested in that other niche. The paper suppliers 
euphemistically call them decorative art papers to spare the older 
customers the truth.


-- 
Met vriendelijke groeten,   Ernst

Try: http://tech.groups.yahoo.com/group/Wide_Inkjet_Printers/

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