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There are a couple of things that could be happening with this. As others have stated, the transparency effects in the postscript file could be causing the problem. The easy way to test this would be to rasterize the file in Illustrator or Photoshop, turning the file in to flattened pixels. Then...

Used equipment always carries an element of risk unless the equipment can be seen in operation before the purchase. There are many structural differences between any solvent printer and the HP Latex machines. In any large-format printer, replacing printed circuit boards are always a major...

In absolute terms, the size of the patch should not really matter, unless there are color or density variations across the width of the printer's output area. One thing that you can do in ONYX would be to print multiple iterations of the patch sets, measure them, and then have ONYX average the...

The i1Pro2 device generates a smaller size patch than the older i1Pro did. This is due to a much higher strobe frame capture rate (200 fps) on the i1Pro2 device. While it is possible to scale the size of the patch chart in Onyx, you need to be careful that the size does not exceed the length of...

Oracal 3268 recommends a minimum .25 inch wide unprinted border off of the ink to minimize edge curl with eco-solvent inks. That is almost impossible with one inch tall lettering. I have found the Avery MPI 2611 to be more curl-resistant (though not entirely with solvent ink) on a variety of...

The size and pattern of the charts are dictated by the choice of measurement instrument that you have defined in the Media Manager module of ONYX. Different devices will dictate different charts.

Issue #1: Could be contaminated or dirty media. The simplest way to check this is to use a different roll and check for consistency.e Issue #2: Replace your dampers. They contain a one-way valve that can be compromised and allow ink contamination across colors.

The app itself was released in Dec when the beta closed. The firmware necessary for the app to work with the 300 series has not been released yet. The product was announced for a mid-January release when it was initially made public at SGIA in October 2014. That timeframe has not changed.

The HP Latex App solution has not been released just yet. It requires the app itself as well as a new firmware update that has not been distributed. It is scheduled to be released later this month (January 2015).

The Cannon is a traditional water based printer that is great for indoor applications. It is perfect for high quality printing onto coated paper medias.

http://support.rolanddga.com/_layouts/RolandDGA/productdetail.aspx?pm=VS-640i On the link above there is a PDF document that is titled 'Creating Profiles with Roland Versaworks'. It is a good place to start learning about the profile creation procedure.

The HP 5000 / 5500 series only run traditional aqueous dye or pigment inks. It is not and cannot be converted to a UV-curing printer.

To the OP: When you refer to printing 'black' I would assume that you are referring to grayscale (achromatic) images and gradients. Using the Versaworks Color Management setting 'Density Control Only' is Roland's term for turning off ICC Profiles and color correction. For grayscale images...

That's the cool thing about the HP OMAS camera system, it automates the process of feed calibrations, and it constantly performs the calibration adjustments as the device is printing. The superior image quality of the HP Latex machines is directly attributable to this type of on-board...

You are referring the diameter of the feed roll of media (I think). The drum I am speaking of is the circular drum that the pinch rollers press the media against to advance the media through the printer. The diameter of the drum is fixed and does not change. The media thickness is the variable.

On a drum-based plotter (printer), the media is being transported by the drum. The amount of distance that one rotation of the drum covers is based on the thickness of the media, in much the same fashion as a snow tire (high profile tire) cover more distance per rotation versus a normal diameter...

OP is correct, the calibration is principally based on the thickness of the media that is being printed on. The weight of the roll is another variable, and that obviously changes as the media roll is gradually consumed. Each machine is unique, and thus, for best results the calibration really...

Did I miss where the OP mentioned any specific Pantone or Sherwin Willliams paint colors?

Actually, with ONYX Postershop and Adobe Illustrator, the hard work has been done for you by the developers of the applications. Both products already include Pantone Spot Color Tables in them, and that eliminates the need to take any measurements for Pantone PMS colors. All you need to do is...

There is a far more accurate and intelligent way, but I don't know that I would characterize it as entirely 'easier'. Many RIP software products (you don't mention which RIP you are using), and popular design programs already contain references to Pantone PMS colors in them. Most of these same...