[cups] Correct Mimetype For Raw Printing Using ipptool

[Michael Sweet]

Matt,

> On Jun 1, 2018, at 6:11 PM, Matt Andrews <mattandrews at massey.com.au> wrote:
> 
> Thanks Michael.
> 
> When you say “direct printing” do you mean using the raw mime type, or do
> you mean bypassing CUPS entirely?

Bypassing CUPS entirely - all CUPS gives you is queuing in the raw printing case, and most label jobs last a few seconds at most...

> As far as label printers go, more specifically the make I’m using which is
> Zebra, their recommended setup is actually through cups.

Right, using a driver and not using raw printing... :)

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Michael Sweet, Senior Printing System Engineer