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Yeah, problems like that are why I insisted on having a chip book so that I could tear off a chip to present to the client when they signed off, and to affix to the proofs sent to the printer.

It was expensive, but it also ensured that everyone was on the same page (literally).

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We keep samples of every print run and also use that to cut out and send samples telling the printers to match. They can drift over time so by keeping every run we can monitor.

Some printer are better than others and although often you get what you pay for it's far from guaranteed.

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