A simple review of CIE ΔE* (Color Difference) Equations

If you work in the color industry, either you are a brand owner, merchandise designer, printing professional, paint department staff in Home Depot or Lowe’s, or just a complete color geek like me, you will likely hear the term “ΔE”, pronounced “delta-E”. Since I work in the color industry, I spend most of my time talking to all of the professionals listed above. Not surprisingly, many of them did not start in the printing or…

The Beauty of Color Transformation in Fall Foliage

This blog is inspired by John Seymour, also known as John the Math Guy (http://johnthemathguy.com/). Last year in 2016, John wrote a blog about his burning bush, the euonymus alaus, and the fact that it was starting chromatic transmogrification in September ( http://johnthemathguy.blogspot.com/2016/09/the-color-of-leaves.html). In his article, he picked several leaves and plotted the CIE a* & b* graph, as well as a spectral curve for each. Due to the fact that maple trees are quite…

Pre-Launch of Newest SpectroDens | Densitometer and Spectrophotometer

Customer feedback has always driven our product development and innovation; and the latest updates to our SpectroDens are no exception. As a member of our Techkon community, you are the first to hear about and be able to PRE-ORDER at no additional cost the newest SpectroDens to be unveiled in January. Here is a sneak preview of some of the new features: SCCA Reference value correction The practice of following print standards like ISO 12647…

LED versus Incandescent Lighting

As the debate over LED versus incandescent lighting continues throughout a variety of industries, it seems there is less to deliberate within the color measurement industry; namely for use in densitometers and spectrophotometers. There are 5 compelling reasons for choosing a densitometer or spectrophotometer that uses an LED light source. LEDs last longer. In fact, LED’s can last up to 10 times longer than incandescent light; which translates into an average incandescent lamp life of…

Do you have a unique color challenge?

Measuring, monitoring, and maintaining the strict color tolerances being demanded by brand owners is an increasingly complex component of your print production process. Issues unique to you and your customer base compound the challenge of maintaining reliable, continuous color quality. That’s why an out of the box system won’t fully satisfy your needs. The only way to solve your specific issues is with a customized solution designed specifically to address your needs. The dynamic state…

Expanded Color Gamut: Seminar and Open House

See Techkon equipment on display at the Expanded Color Gamut Seminar and Open House! June 18: Hilton Indian Lakes, Bloomingdale, IL Presenters: Mark Samworth, Esko & Catherine Haynes, All Printing Resources APR and Esko jointly present an informative industry seminar focused on the trending topic of Expanded Color Gamut (ECG), followed by an APR Open House. “Expanded gamut has increased from less than 1% to roughly 14% of industry printers in the last 5 years….

Index of Natural and Artifical Light

Tn [Kelvin] 1000000/Tn [Mired] Illuminant, nature Source, simulation > 5300 K: “Daylight white” natural lighting 13 500 to 27 000 Approx. 74 to 37 North blue sky – 9 300 107 – Original white point of CRT screens 9 000 to 12 000 111 to 83 “The blue hour” Only perceptible with eyes used to warm white 8 500 125 Lighting in fog – 7504 (“7500”) 133 D75 – North sky daylight Predefined in just…

What is Closed-Loop Color Process Control for Digital Presses

Periodic monitoring of the aim characteristics (required colorant and overprint values) of a digital press is an important prerequisite for ensuring consistent color reproduction. The remainder of the necessary and sufficient operations for commendable color quality is the ability to correct colorant densities to meet aim values. Each of these two operations can be accomplished either manually or automatically via hardware and software. The former is the traditional process, which leaves lots of margin for…

Top 5 Reasons to Consider “Closed Loop” for Digital Presses

The traditional method of color calibration of a digital press is a manual operation, which falls into two logical categories. The first is a one-time task during the make-ready operation and the second is on going during the press run. With an automated process, color make-ready and run time press calibration fold into one continuous operation from press startup to print run completion. A high-speed color measurement instrument (in-line spectrophotometer) mounted on the press will…

5 Advantages of Using a Scanning Spectrophotometer

Automate your color control process A scanning spectrophotometer is a perfect tool to aid in the task of automating your color control process. It is designed to scan entire press sheet color bars in a matter of seconds thus eliminating the need for manual measurements via a handheld device. These devices are fast, accurate, and can also scan color bars anywhere on the press sheet. Collect & distribute data The ability to automatically gather required…

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