🚀 go-pugleaf

SaGS, 

At the risk of jumping to conclusions, I think the main idea is to save costs. Colour printouts are considerably more expensive than B&W. The presence or absence of colour values in the PostScript files is not relevant. 

Eric's printer has the "option to print B&W". Some printers are like that. Toggle a PostScript invocation properly, and voila, the printer only prints using black toner using grayscale values. Or perhaps a PostScript string is clobbered. But the idea is that the user is restricted to whatever choice Eric wants him to have. 

I think it is too early to say that this "cannot be safely accomplished by tricking the PPD". The PPD is altered. It's the driver which is tricked into seeing the printer as grayscale or activating the colour toggle. 

By the way, my real name appears at the signature block. Pleader is merely a login name. 

Regards, 
Victor Lee.