Recent content by ljgoldberg

I'm looking for a method to minimize the time required for the preparation and organization of customization of an inkjet printed item. Think of the toothbrush with your dentist's name on it that you get with every visit. - Artwork is currently manually received from the dentist's office...

As I mentioned previously; 05-12-2017, 06:37 PM Do I dare mention that we now also offer a new denso-spectro-colorimeter that allows the user to choose between the bad old Murray - Davies Dot Gain formula or the shiny new SCTV ISO 20654 method? Or just wait until someone asks why a checkerboard...

In the bad old days of Pantone (before X-Rite), color matching was done visually by one talented individual under office lighting. "Why don't you use XYZ lighting?" we inquired. "Because this is what our customers (designers primarily) do."

Well, since you asked, the Beta Presto Spectro offers traditional Murray-Davies Dot Area calculation, or TVI, or Dot Gain as well as the shiny new SCTV (ISO 20654) . Details on our website; https://betascreen.net/products/betacolor-presto-spectro

Do I dare mention that we now also offer a new denso-spectro-colorimeter that allows the user to choose between the bad old Murray - Davies Dot Gain formula or the shiny new SCTV ISO 20654 method? Or just wait until someone asks why a checkerboard measures 68% or why M_D dot gain measurements...

I guess my work here is done. :( ljgoldberg

There are standards describing gloss levels. One of the good things about standards is that there are so many of them. :( The gloss of any sample will appear to change based on the viewing conditions. There are at least five widely used gloss measuring angles kicking around these days; 20, 45...

All image-based plate reading instruments use visible light (400 - 700nm) sources and roughly equivalent imaging sensors. If YOU cannot readily see the image of the halftone, neither can the instrument. They cannot measure what they cannot "see". Decades ago Agfa released a plate with a nearly...

I was hoping it would be interesting or useful to someone ELSE as well. :) We showed this at the recent DRUPA exposition in Dusseldorf. It seemed like EVERY banknote printer, security system vendor, ink supplier, etc. stopped by to visit and ask questions. We showed this at the last DRUPA...

There exists a series of instruments that MEASURE the intensity and colorimetric coordinates of the fluorescence produced by UV LEDS at 365nm, 280nm, and 254nm. ​If the ink is known to be correct and authentic, and the objective is only to verify that an inkjet is not clogged or an anilox...

"Good answer!" as they say on Family Feud. Q: Why don't they install 6000K fluorescent lamps in the press room so they can see the yellow dots better? A: Because there are better ways to see and measure yellow dots; densitometers, Beta Color Viewer, etc. Hint #1: Measure -> Analyze -> Process...

Regarding "invisible inks" that are not normally visible on the finished sheet, but which glow brightly under 365, 280, or 254 nanometer UV irradiation. For the printers that use these inks for anti-counterfeiting, brand protection, or other purposes, how do you control the printing process to...

To answer Gordo's questions; Reading wet ink (with its corresponding smooth, shiny, specular, WET surface) with a polarizing densitometer does not produce significantly higher densities than with a non-polarizing densitometer. Getting a polarized and a non-polarized densitometer calibrated...

"We used the same densitometer, plates, blankets and paper. " Gloss can have a strong effect on visual density. The automatic reaction of the viewer is to tilt the sample to avoid a specular reflection from a high-gloss sample. A 0/45 densitometer will report a higher density from a high-gloss...

A portion of the 18% gain is a measuring artifact. The film negative measured by transmitted light, or the file by the TIFF viewer, calculates an exact ratio of dark image areas to light non-image areas. The boundary areas are unambiguous and not subject to significant variations under normal...