Gamut compression

Here's a nice explanation of what happens when you use an old printer in a modern workflow, from Adobe's Jim King: "Since the most notorious color gamut compressions involve reducing the total number of colors that can be represented going back to the original values is usually impossible. What has been lost is lost.

So it is best to delay any steps where gamut compression can occur to avoid reducing the gamut of the data we have. It must be done for output to gamut reduced devices but it is best to reduce your data in this way only in the last step."

In other words, work your workflow. Save your file for discovery. Then target for your old printer and print your exhibits.

Enjoy.