Re: filmscanners: File sizes, file formats, etc. for printing 8.5 x 11and 13 x 17...

[Arthur Entlich <artistic@ampsc.com>]

Austin Franklin wrote:

>> ... that dot
>> from your printer can only be one of at test a dozen colors.  In most
>> cases ... the printer can only place on dot of
>> each color in it's cartridges on any one spot.  So, a CMYK printer, can,
>> for instance, place a C, CM, CY, CK, CMY, CMK, M, MY, MK, MYK, Y, YK or
>> CMYK dot down in one of those locations.
> 
> 
> I am curious how you know they (let's say the Epson printers) print more
> than one dot at any one 'point' on the paper, ie, the CM, CY etc. 'colors'
> you mention?  I believed, though I could be wrong, they only print one
> color, C or M or Y or K at any spot on the paper.  That they did no blending
> of ink, which is what I take you are saying they do.

Let's call it empirical observation.  With my 720 dpi printers, when I 
print a light green, for instance, using a loupe, I can see that the 
yellow and cyan dots overlay, in fact they are in almost exactly the 
same location.  Same is true for other mixtures, such as browns, blues, 
etc.  It may only be obvious with certain values where equal number of 
both dots occur.  Also, if you make a square of CMY black, you cannot 
see any distinct colored dots.

I am not, BTW, implying that the Epson print head or drivers are 
necessarily capable of firing more than one dot or color in one place on 
the same pass.  As you probably know, they overlay dots on successive 
passes, so it certainly might be a matter of this occurring during that 
process.  But clearly, on the output on my printer, there are distinctly 
different colored dots over one another.

Art