QTR-Quadtone RIP

Bit map images aren't really supported but the whole print system.
It's worth noting that everything is converted to 720x720 ppi
grayscale image before going to QTR.
For the most control you can create the exact 720 ppi gray image that you want.

Roy

On Wed, Nov 25, 2009 at 2:21 PM, David <dkfreed@whidbey.com> wrote:
> Thanks Roy -- finally, the answer! Its just a guess on my part, but I'm wondering if the random dot placement of inkjet printers is why they don't print bit-map images all that well, and often print them very dark? (And why I'm having so much trouble getting the results I want)
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> best, david
>
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> --- In QuadtoneRIP@yahoogroups.com, Roy Harrington <roy@...> wrote:
>>
>> Hi David,
>>
>> The only way to get specific ratios of two inks is to mix the inks by hand and load the
>> mixture into one of the ink carts.  The printers only output up to 3 different ink drop sizes so the printer itself can't do what you are asking for.  Inkjet printers in general use dithering to get multiple levels -- your eye does the averaging of a larger area
>> than one ink drop.
>>
>> QTR doesn't have a way to correlate positioning of different inks.  In
>> fact the idea is just the opposite -- eliminate dot patterns by more randomness of dot placement.
>>
>> Roy
>>
>>
>> On Wed, Nov 25, 2009 at 10:00 AM, David <dkfreed@...> wrote:
>> > Thanks again Joost.
>> >
>> >
>> > Getting back to my original question, I'd still like to know the settings/curves in QTR, so that each dot of ink laid down is a certain mix of two color inks, say magenta and yellow, or cyan and magenta; so if I printed a bit mapped image the dots of ink would be this color combination, bit the spaces in between would be blank.
>> >
>> > Best, David.
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