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QTR-Quadtone RIP

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Jepg Vs Tiff In QTR.

Jepg Vs Tiff In QTR.

2014-04-26 by <benedictchen22@...>

Hi I am using Lighroom and I use the Print function as it let me generate description, title and all that easily. I really am horrible at Photoshop.


So the Question is will exporting Jepg from lightroom print module then to QTR affect the results?

Re: [QuadtoneRIP] Jepg Vs Tiff In QTR.

2014-04-26 by David Kachel

So the Question is will exporting Jepg from lightroom print module then to
QTR affect the results?


Yes.


David Kachel

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Re: Jepg Vs Tiff In QTR.

2014-04-27 by <donsbryant@...>

The short answer is yes because QTR will convert RGB much like the Epson ABW drive if you are familiar with that.

Roy includes a write wish you should read located in the QTR icc folder. If you are using LR 5.x you can softproof with the gray matt or gray photo ICC file and you can convert by choosing the profile when you export from LR. There's more to it than my simple answer but try that for grins.

Don Bryant

Re: Jepg Vs Tiff In QTR.

2014-04-28 by <benedictchen22@...>

Hi,

My work process from LR to QTR

is to use develop with my own QTR icc (Normally here I convert to BW) > use print to add text , title captions> Export as Jepg. then QTR

Alternatively Export Tiff from LR after Development in LR

Hmmm what kind of specific effect would there be?

Re: Jepg Vs Tiff In QTR.

2014-04-29 by <donsbryant@...>

What ever your workflow is if you submit a RGB file to QTR then R=G=B must be true otherwise those values are changed to calculate the K values since it is a gray scale RIP.

From the QTR user guide:

The .tiff format is very flexible and images stored in this format can have a
wide range of characteristics. Recent versions of QuadToneRIP have
removed many of the constraints on the image characteristics, but it must
be either a grayscale or RGB image. If the image is RGB, QuadToneRIP will
convert it to grayscale. If the image is 16 bit, it will be converted to 8 bit.
Alpha channels in the image will be ignored and layers are permitted. The
image can be in compressed (LZW only) or uncompressed format. Note that
any conversions are only applied to the image data actually processed by
QuadToneRIP.

When QTR does the conversion if a pixel value doesn't have R=G=B then QTR will convert those unequal values behind your back and the result may not be to your liking. So to repeat or to clarify, convert to Gray Gamma 2.2.

I would suggest you do some reading of the archives and other sources to understand the best practices for printing with QTR.






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