QTR-Quadtone RIP

ferdinand_paris wrote:
> Thanks again for advice.  A few more questions if I may.
> 
> (i)  I'm hoping to produce a 1440 curve for EpEnhMatte, since the 2880
> curve seems to use too much ink for this paper.  Is there any point in
> trying to base a 1440 curve on an attempt to simulate a Cone-produced
> 2880 curve, either by using ACV files, or by entering points?  That
> is, will such 2880 curves inherently make the ink limits too low for
> 1440?  Would I be better simply to try and create a 2880 curve and
> lower the limits, based on the ink separation page?  
> 
> Perhaps another way of asking this question is whether the individual
> curves that you enter for each ink are absolute or relative curves? 
> Hope this makes sense.

You just need to use lower ink limits with 2880dpi, probably in the 
region of 35-60% lower.

I'm still not clear why you have rejected the "take existing curve for 
similar paper/adjust ink limit at print time (if necessary)/make ICC for 
new paper" method that Roy suggested. It sounds a lot simpler.

> (i)  Are there any software or Excel tricks for taking two columns of
> data and producing the "xx.xxx;yy.yyy" pair that are required for
> entering points in QTR?  And conversely, i.e. for taking the pairs and
> producing columns in a spreadsheet?
> 

I just copied & pasted straight from Carl's email and all the points 
appeared correctly. The only problems was that their appear to be more 
points than boxes available so I guess you'll have to stick to editing 
the text file if you want that number of points.

Howard