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Re: [QuadtoneRIP] Re: Will QTR use Epson's Better Dither on the 4800?

2005-06-28 by Ernst Dinkla

>Roy,
>
>I'm quite sure Epson information mentioned something about other weaving 
>methods or alike. Will try to find it.
>
>Ernst
>
>  
>
In the Stylus Pro 4800_4800.pdf (Stylus Pro 4800 Brochure) the following 
is written about the Black and White specs: Proprietary Epson Screening 
Technology developed specifically for black and white printing. Maybe 
interpretable in more than one way: is it how the dots are placed or is 
it referring to partitioning ?

At the start of the brochure a technology is mentioned: Proprietary 
Active Meniscus Control AMC precisely controls the curvature of every 
ink droplet within each nozzle before releasing it into the media. the 
result is extremely sharp and accurate placement of ink droplets for 
outstanding photographic print quality.
That doesn't indicate new weaving but can explain better droplet 
formation with old weaving routines. All done at printer 
hardware/firmware level though. The Pro range always had more consistent 
droplet sizes and placement than the desktop models. And probably 
related to that: larger minimum droplet sizes.

Wonder how they do the meniscus measurement and how the correction 
within the short time possible is executed ?  Measuring different 
conduction at the nozzle surface, reflection of the surface while the 
droplet is formed, acoustic measuring ?  It is not the fact that it can 
be done but at this speed and that it will work in an environment with 
ink flying around for months that amazes me.

Ernst

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