Use four transparent planning models for color difference, viewing distance, paper mass and booklet creep. Nothing is uploaded and no default is presented as a printer guarantee.
Enter two CIELAB samples. The lab reports both simple Euclidean ΔE76 and the perceptually weighted CIEDE2000 result. Use the tolerance specified by the proofing or quality-control workflow rather than a universal pass/fail number.
Translate a chosen angular-detail target into a raster planning density. A 1 arc-minute setting is a geometric acuity reference, not a printer rule. Viewing conditions, contrast, source quality and output process still matter.
Estimate stack height from measured caliper and paper mass from physical sheet area and GSM. Do not infer thickness from GSM: two stocks with the same grammage can have different bulk and caliper.
Estimate maximum fore-edge push-out for uniformly nested saddle-stitched sheets using measured sheet caliper. The lab also shows the incremental planning value by sheet. Folding pressure, mixed stocks and the imposition system can change the compensation actually used.
ΔE measures separation between two colorimetric samples. It does not by itself define acceptability; substrate, measurement condition, proof standard and customer tolerance determine that.
The angular model is useful when planning large displays. It does not override a printer's minimum raster requirement or fix blur, compression and poor focus.
Use actual caliper when stack height or creep matters. GSM is mass per area, not thickness, and bulk changes across paper grades.
Use the estimate to decide whether creep needs attention, then apply the production system's imposition method. Adobe InDesign, for example, distributes a specified creep value across sheets.