Digital BW, The Print

In a message dated 2/2/06 5:58:21 PM, cj@... writes:


> >You're saying that the flakes are just left over from the
> >manufacturing process but the coating that's on the paper is
> >solidly adhered to it.  Can someone confirm this?  
> 
> My understanding is that white spots that we refer to as "flaking" can
> be caused by both reasons.  There can be residual mfg dust.  But the
> coating itself flaking off is also a very real problem.
> 
Definately both, and they can also occur with the built in cutter in wide 
format printers. 
> 
> A paper vendor told me in a phone conversation last summer that the
> reason there is a general correlation between high dmax and high
> flaking, is because both are related to the density of the coating.
> The denser the coating the better the dmax and also the greater the
> chance of flaking.  This is why H. papers are famous for both.  This
> vendor said that the reason their papers have slightly less dmax than
> H. papers is because they wanted to lessen flaking, and settled on
> what they thought was a good balance between the two.
> 
> Right, but if you can produce a paper coating that is less brittle and 
flakey, and more tough and leathery, then it is less prone to dimpling off when you 
bend the paper, less prone to dusting when you cut the paper, and less prone 
to adhering on top of the paper as stray scrids that need to be brushed away 
before running the sheet through the printer. Thats why the more recent version 
of Entrada is far more practical for printing images with large dark areas 
than most other art papers, and older versions of Entrada. I find my print loss 
rate to "dandruff" related problems to be about 90 percent lower.

C. David Tobie
Product Technology Manager
ColorVision Business Unit
Datacolor Inc.
CDTobie@...
www.colorvision.com



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