I'd have to agree with the other respondents on this one and maybe go one extra stage. Admittedly I am fairly new to colour printing but recently I repeated a print I had done 2 months before on the same batch of paper. My colour analyser reproduced exactly the same colour balance and against the master print I had kept it was identical.
Originally Posted by stevewillard
The analyser was a secondhand Paterson PCA2060 so no rolls-royce of an analyser.
The real problem arises when you change to a new batch of paper even of the same make but then the analyser only needs a small amount of re-calibration. Maybe one or two test prints against the master print to resolve the balance.
Tiny differences in balance may be detectable by instruments but probably not by human eye and normally the customer wants another print for someone else or has given away his original and wants a replacement. It would be unusual for any critical comparison to be made.
If a customer/friend were to be that critical then it is likely that he/she is also in the colour business and if he/she were, then being critical he/she would want to produce their own prints.