We have been using an i1 pro with a UV filter with ProfileMaker to build profiles and calibrate our Epson proofers on various media (proofing paper, canvas, photo paper).
We also have an older i1 pro that does not have a UV filter, that we rarely use.
We are currently using the one with the UV filter to read in P2P targets for G7 calibration of our offset presses. We use the IDEAlink curve software to generate the gray balanced curve and manually enter the curve data into our Heidelberg Meta RIP.
In the pressroom we do not have UV filters on our handheld densitometers, nor our Intellitrax scanners. These devices have been calibrated by Xrite recently and are reading about the same as each other, but drastically different than our i1.
When reading with the handheld densitometer, I have noticed that our current press stocks are very negative in the B value (-4 to -5) --- a clear sign of optical brighteners. The i1 with the UV filter reads the paper color as closer to white (a=-0.17, b=-0.15).
My question is: which i1 reader would you use to do G7 press/plate calibration? The pressroom manager thinks we should use the old one without the filter instead so that all our numbers are the same. I think we should instead put UV filters on the devices in the pressroom (likely to be too expensive).
Thanks in advance for any input on this topic.
-CJS
We also have an older i1 pro that does not have a UV filter, that we rarely use.
We are currently using the one with the UV filter to read in P2P targets for G7 calibration of our offset presses. We use the IDEAlink curve software to generate the gray balanced curve and manually enter the curve data into our Heidelberg Meta RIP.
In the pressroom we do not have UV filters on our handheld densitometers, nor our Intellitrax scanners. These devices have been calibrated by Xrite recently and are reading about the same as each other, but drastically different than our i1.
When reading with the handheld densitometer, I have noticed that our current press stocks are very negative in the B value (-4 to -5) --- a clear sign of optical brighteners. The i1 with the UV filter reads the paper color as closer to white (a=-0.17, b=-0.15).
My question is: which i1 reader would you use to do G7 press/plate calibration? The pressroom manager thinks we should use the old one without the filter instead so that all our numbers are the same. I think we should instead put UV filters on the devices in the pressroom (likely to be too expensive).
Thanks in advance for any input on this topic.
-CJS