QTR-Quadtone RIP

I have been using Ilford Smooth papers on my 3800 for both colour and B&W and have been happy with the results. I was a bit concerned then to see that Ilford had released a new version of the papers, with an "improved" coating.

Having obtained a sample pack, I have just completed a first-pass set of curves for QTR (UCpk ink). The new paper prints noticeably warmer than the original, and this shows up in my new colour profiles and in the QTR curves.The good news is that this paper can still give good linearity and neutrality up to a Dmax of nearly 2.5. 

The bad news, at least for 3800 users, is that Ilford will not be producing A2 sheets in this new version. They tell me that sales in this size do not justify keeping it. 

I have posted the curves, along with an Excel spreadsheet showing the i1 measurements, in the "Files" section. I'm not suggesting they are perfect as yet, so I would appreciate any feedback from anyone that would like to try them.

Roger

Roger,

 

The curves you uploaded are to the file section are as you write "linearized
with the i1".

 

What does that mean?

 

 

 

remko


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Hi Remko,

When the curves are generated initially, the density in the image always rises too fast so you get compressed shadows. The linearisation procedure uses measurements from a spectro like the i1 Pro to compensate for this non-linearity. If you look at the plots of L* you will see that after linearisation they rise very uniformly right up to step 100. There are a couple of good documents on the QTR site that explain the processes.

Incidentally, having looked at my step wedges again, I am inclined to change the "Warm" to "Sepia"! It really does look very warm.....

Roger

--- In QuadtoneRIP@yahoogroups.com, "remko" <remko@...> wrote:

>
> Roger,
>  
> The curves you uploaded are to the file section are as you write "linearized
> with the i1".
> > 
> What does that mean?
>> 
>  
> 
> remko
>