QTR-Quadtone RIP

To quote the vernacular... OMG !

I just gave it a try and it works great with QTR etc.

My next step is to see if my QTR calibration profiles need to be redone.

Thank you so much !

In the absence of the Curve Creation Tool and its linearization feature, what is the recommended way to linearize a new profile ?

I have a Spyder Print spectrophotometer which I ordinarily use with the Curve Creation tool to manually measure 21 steps.

Many thanks !!

Ken,

The best way I have found to do this is with a spectrophometer (iOne or iOne 2) that will scan in one swipe either a 21 step gray or 21X4 random target. The basic steps, once you have set the ink limits and values for your inkset, are.

1. Print a 21 step or 21X4 random target, with your profile, with no curve. The targets are available in the iOne folder of QTR.

2. Scan the target with the iOne (or iOne 2). This creates an output file of lab values. You do this with one swipe.

3. Drop the output file on the QTR-Linearize-Data program, which will create output for the Linearize command.

4. Insert the Linearize data into your profile.

5. Run the QTR install command for your printer.

I find the use of the iOne for this purpose much easier and faster than the Spyder Print 3 since the Spyder only does one reading of the target at a time.

The iOne is used with the Measure Tool, which does not work with MAC OS above 10.6.8. The iOne 2 works with iProfiler with current MAC systems.

Sandy

The Eye One tools look very attractive.

In an attempt to mimic the Windows linearize feature, I took measurements with my SpyderPRINT and added them to the bottom of the .QIDF file, like this.

LINEARIZE=".06 .09 .14 .20 .26 .33 .41 .49 .55 .65 .75 .86 .97 1.05 1.19 1.28 1.37 1.46 1.55 1.59 1.64 "

Then I re-ran the install3880 command to regenerate the .QUAD file.

Will this work or have I overlooked something ?

Using the Mac profile on the Mac, my sample print matches what I can make on Windows with the Windows profile. It seems to work fine now.

Ken,

Your LINEARIZE command numbers look like density values? When I generated the LINEARIZE command from the density/lab values .txt files measured with the Spyder 3, and with the iOne, and dropped those files on the QTR-LINEARIAE-DATA program, this is what I got.

Spyder 3
LINEARIZE="93.73 91.66 89 85.55 81.55 77.84 73.61 71.1 66.49 62.4 58.86 57.79 52.2 50.54 42.52 37.76 33.49 29.14 27.1 23 18.95"

iOne
LINEARIZE="94.32 92.11 89.22 85.85 82.05 78.14 74.01 69.7 65.86 62.14 58.29 54.11 50.01 45.69 41.88 37.72 33.67 29.37 25.74 22.08 17.71"

The LINEARIZE is added to the QTR .txt profile, then you run Install, which generates a curve for the .quad file. In a MAC you can record this from the Linux terminal program, as for example.

LINEARIZE = "95.18 92.88 89.91 86.33 82.4 78.64 74.61 70.28 66.42 62.83 59 54.7 50.51 46.11 42.38 38.15 33.96 29.7 26.07 22.3 17.81"
LINEARIZE_CURVE = 0,0 2.97,5 6.81,10 11.44,15 16.52,20 21.38,25 26.59,30 32.18,35 37.17,40 41.81,45 46.76,50 52.32,55 57.74,60 63.42,65 68.24,70 73.71,75 79.13,80 84.63,85 89.32,90 94.2,95 100,100
0 0
10 4185 ***
21 7610 ******
31 10300 ********
42 13074 **********
53 15985 ************
63 18519 **************
74 21075 ****************
85 23656 ******************
95 26273 ********************
106 29322 **********************
116 31968 ************************
127 34572 **************************
138 37136 ****************************
148 39493 ******************************
159 41938 ********************************
170 44809 **********************************
180 47328 ************************************
191 49865 **************************************
201 52246 ****************************************
212 54771 ******************************************
223 57645 ********************************************
233 60414 **********************************************
244 63149 ************************************************
255 65535 **************************************************

Thank you very much !