QTR-Quadtone RIP

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?

>
> 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?
>

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?

>
> 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?
>

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?

> On Dec 1, 2014, at 7:49 PM, "richard@... [QuadtoneRIP]" <QuadtoneRIP@...m> wrote:
>
> The output with calibration mode is strictly 1 to 1 and there is no "curve" or any other behind the scenes adjustment to the file as it is sent to the printer. The point of the calibration mode is to see what the native linear response of the printer is so you can then correct for it in the profile creation process. The red channel determines what ink channel to fire, and the green channel determines the percentage of ink to fire—G-255 is no ink G-0 is 100% ink. The ink limit setting in the print dialog box controls how much is fired at the G-0 value, and all the values from G-255 to G-0 are linear relative to that overall ink limit. If you wanted to use a lot of paper setting your ink limits you could make a 256-step target for each channel and see exactly where the d-max for each shade is and where overlaps fall—overkill, even for me.
>
> Higher end rips like Studio Print will actually linearize each channel individually. That isn't an option with QTR, but if you don't go crazy setting ink limits past where the dot gain curve levels off the native density increase is pretty much linear (at least for the lighter shades). The darker shades are controlled in some of the .qdif/.txt file options like ' GRAY_SHADOW="  " ' and  ' GRAY_CURVE="  " '
>
>
> New User Guide: I announced over the summer that am working on one. It was going to just be a short PDF, but as I get into some of the more advanced methods for making multi-gray profiles it is getting longer and needs a full ebook to cover the three different approaches for OEM and Thrid party gray inksets. My day job had me busy for the last few months and I haven't worked it all out yet. I am spending the next month hammering away on it, and should be ready early next year. The full book will also come with new targets, references files and methods for current software and excel templates for making the profile creation process easier.
>
> Richard Boutwell
>
> www.bwmastery.com
> www.RichardBoutwell.com
>
>