I am trying to create a customized quad for Ware New Cycanotype chemistry and struggling to get a smooth target print.
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Printed limiter.tiff with QTRQui using the 4900 Pro-PiezoDN-Master following consistent darkroom procedures.
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Limiter value was calculated as 64 and Photoshop curve created.
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Curve numbers added to Piezography Cuve Adjustment workbook. Generated CGATs numbers and ran QTR-Linearize-Quad and failed to generate quad with an error of incorrect order.
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Tried correcting generated CGATs to makes sure all “L” values were at least 0.3 apart if necessary. Same error when attempting to generate quad.
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Switched to PPE and was able to use the PPE generated quad.
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Printed PiezoDN-129step-i1Pro2.tiff and measure values and feed those back into PPE
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Printed PiezodN-129STep-i1Pro2.tiff again and made some improvements.
Looking at the results and the negative it looks like there is just way too much density being generated for the highlights.
Is there a way with PIezoDN or PPE to provide a top limit for overall max density for a process?
Also how does the “Invert Curve” option in PPE work and when should it be used? If I load an existing PiezoDN Quad as the “Starting Curve” I believe the “New Curve” is in the correct order and do not need to check “Invert Curve”, if using some over positive process quad and want to create a negative process curve I would check “Invert Curve” to so that “New Curve” is reversed?
Cheers.
David