QTR-Quadtone RIP

They are different units that measure the same thing. I like to set my ink limit using the darkest value that still maintains at least 1.0 L* between it and the next lightest value. I also use a ColorMunki, which exports Lab values. So, I use Lab. I used to use density. Either will work fine. 

Btw, if you use Lab values with CreateICC you can soft proof the print tones in Photoshop. That's where the a* and b* in Lab come in handy. I also like to look at tonality as I'm building my curves, but it's a "nice to have", and not a requirement. 

Terry. 



On 2012-01-19, at 9:35 AM, "Keith" <kjrslr@...> wrote:

> Thank You! I'm assuming that I would choose density, correct? I think that's what I selected last time.
> 
> --- In QuadtoneRIP@yahoogroups.com, Terry Ritz <t.ritz@...> wrote:
>> 
>> In Spyder3Print you pull down <Tools> and choose <Calibrate>. Then pull
>> <Tools> down again and select <Measure>. In the Measure tool click on
>> <Export to...> and choose a file name and location. Once done you have to
>> specify either Lab or Density, and then take your measurements.
>> 
>> Terry.
>> 
>> On 12-01-18 5:12 PM, "Keith" <kjrslr@...> wrote:
>> 
>>> Thank you both, Mike & Terry!
>>> I did make the calibration print with the slider indicating 100, so it sound
>>> that at this point I'm good to go. For now. Until my next question. If it is a
>>> typo, it's gone unquestioned for almost 7 years.
>>> My next question concerns reading the cal print. The last time I went through
>>> this(I did this ONCE-well over a year ago) I used my DataColor
>>> spectrcolorimeter, but can't remember the steps I took. Since all the
>>> documentation involves the Eye-One, is there anyone that uses the DataColor
>>> spectro. I know it can be done, I just don't remember how.
>>> Thanks! 
>>> 
>>> --- In QuadtoneRIP@yahoogroups.com, Terry Ritz <t.ritz@> wrote:
>>>> 
>>>> That must be a typo. You want the calibration slider set to 100 to determine
>>>> how the paper responds to a full ink load. Measuring the step wedge that's
>>>> printed will then help you determine where to set the ink limit for the
>>>> paper. You will set the calibration slider to the ink limit value when you
>>>> make your second calibration print.
>>>> 
>>>> Terry. 
>>>> 
>>>> On 2012-01-17, at 8:36 PM, "Keith" <kjrslr@> wrote:
>>>> 
>>>>> "To print the first Ink Separation Test Page, place a piece of the paper for
>>>>> which the Curve will be designed in the printer, make sure the calibration
>>>>> slider is ALL THE WAY TO THE LEFT(100), click the Print button and you're
>>>>> off."
>>>>> 
>>>>> However in the ink calibration box(in the calibration mode) the slider is
>>>>> all the way to THE RIGHT and the box indicates 100.
>>>>> So which why should the slider be placed? All the way to the left,
>>>>> indicating 1, or all the way to the right, indicating 100.
>>>>> 
>>>>> So which is it?