Collage includes some built-in tools to improve the image data before output: sharpen edges or add gamma curves; apply to all separations or individually.
Collage includes several ways to sharpen an image using the Edge Enhancement Editor. OHIO provides some edge curves, but you can define your own. Different curves can be applied to individual separations. Use the curve on only selected portions of an image; for example, negative text areas need different sharpness than positive text.
Define a curve with basic edge enhancement only — how much to use, what the threshold is. If an image includes CT data, set the Densimetric Sharpness value. To improve fine details such as text, use IntelliEdge processing for LW portions of an image.
To create a sharpness curve, use the Sharpness Editor.
To apply a sharpness curve, on the Gravure Parameters window, Gamma/Sharpness page, select the curves for each separation.
Use a Gamma curve to map an image density value (input) to an engrave value (output). For example, the image designer may have used a gradation that starts at 5%, which cannot be engraved. Use a gamma curve to map 5% input (on the image) to 10% output (on the engraving).
Just like with Sharpness curves, OHIO provides some basic ones, but you can define your own using the Gamma Editor. You can use a different Gamma curve for each separation. You can use the curve on only selected portions of an image.
To create a gamma curve, use the Gamma Editor.
To apply a gamma curve, on the Gravure Parameters window, Gamma/Sharpness page, select the curves for each separation.
If you are outputting to a Hell Engraver, gamma curves are called Gradations. They can be created in the Gamma Editor, and are selected on the Gradation page of the Gravure Parameters window.
Each press can be different. Each substrate can be different. Each ink can be different. Use the Fingerprint Table in the Gamma Ediitor.
Polishing the cylinder before engraving can leave marks behind. Add Densimetric Smoothing to reduce these marks. Densimetric Smoothing is available on the Position Parameters window.
Collage provides two ways to check the job before committing to copper: the Soft-Proof display on-screen and the Hard Proof printed to your networked large format printer.
OHIO Gravure Technologies in Dayton, Ohio USA designs and manufactures advanced equipment for the global gravure printing market. The Engineering, Software Development, and Manufacturing groups work to provide innovative solutions to improve quality and productivity, such as the award-winning Hybrid Engraving System. Our engineering specialty since 1980 is our sub-micron accurate cutting system (Vision engrave head). We provide installation and support for our electromechanical engravers and the prepress layout software Collage for gravure printing.
Ohio Gravure Technologies Inc
1241 Byers Road
Miamisburg Ohio USA 45342
phone +1 937.428.1700
fax +1 937.439.1592