QTR-Quadtone RIP

These are my equivalent measurements (again, substracting the substrate density). Some interesting differences compard with Sandy's figures:


Epson 3800 printed on Pictorico TPF 100 measured with X-rite 361T

 QTR QTR QTR QTR QTR
% Photo Black Light Black Yellow Magenta Cyan
25 1.05 0.62 1.31 0.31 0.61
50 1.85 1.01 2.17 0.51 0.93
75 2.52 1.34 2.68 0.65 1.15
100 3.02 1.54 2.94 0.76 1.32






regards
Peter




________________________________
 From: "sanking@..." <sanking@...>
To: QuadtoneRIP@yahoogroups.com
Sent: Tuesday, 4 March 2014, 21:45
Subject: Re: [QuadtoneRIP] UV transmisison characteristics of Epson K3 inks






Selecting inks for use in a QTR profile for alternative printing with UV processes definitely must have other considerations than those used in line or halftone printing in silkscreen. It is also quite different than the requirements for making monochrome inkjet prints on paper. I am attaching a table that shows the UV readings of the K3 inks on Pictorico, as measured with a UV densitometer at 25%, 50%, 75% and 100%.

Sandy



Measurement of UV densities with Gretag D200-II Center Bandwith 373 nm Ink Pattern Page - Printed Calibration Mode  Pictorico Premium OHP Base density of substrate subtracted from readings
Epson Ultrachrome K3 Epson R3000      
   
25%  
50%  
75%  
100%
Cyan
   
.81  
1.27  
1.69  
1.97
Magenta  
.26  
.39  
.57  
.69
Yellow  
.75  
1.22  
1.74  
2.16
Photo Black  
.73  
1.25  
1.88  
2.34
Light Cyan  
.35  
.53  
.74  
.89
Light Magenta  
.11  
.18  
.24  
.30
Light Black  
.45  
.73  
1.07  
1.35
Light Light Black  
.20  
.31  
.43  
.53