QTR-Quadtone RIP

Kip Cole wrote:
> Howard, thanks for the advice.  The ink limit in the HPR curve I've
> been working from is 75%.   When I measure around that point on a the
> ink limit calibration chart at 100% I get:
> 
> Step     L*
> 50       17.5
> 55       17.8
> 60       18.2
> 65       18.4
> 70       18.6
> 75       18.8     ==> Chosen as ink limit
> 80       18.8
> 85       19.0
> 90       18.8
> 95       19.4
> 100      19.5
> 
> As you suggest, the 75% step is very close to the 80->100 steps, and
> the 70% step too.
> 
> Based on this data, what ink limit would you try as a base.
> 
> Cheers, --Kip
> 
Kip
Those figures look a bit peculiar - they seem to go backwards which 
would indicate over-inking. Are you printing at 1440 or 2880dpi? If at 
2880 you may want to drop the limit even more than the 55% you have 
suggested in your other email. I don't use the UC inks but I would have 
thought you should be able to achieve a better dmax than 1.59 on HPR. 
Eboni ink typically gives 1.68-1.72.

regards
Howard