Color QC and Matching Blog

Color Geometry: A Matter of Degrees

Posted by Elaine Becker on Tue, Jan 05, 2010

Long before computers were invented a radio, film, and television comedy team known as Abbott and Costello perfected a classic skit that became known as the "Who's on First?" routine; essentially a dizzying five-minute display detailing by example the pitfalls of miscommunication via homophones, homonyms, home-run hitters, and high comedic art.

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Tags: standard observer, instrument geometry, color spectrophotometer

Color Me Stressed Out

Posted by Elaine Becker on Mon, Dec 07, 2009
If we put you under the spectrophotometer now, would you show up in deep shades of recession blue? Perhaps.

Tough economic times often mean having to make do with fewer resources to handle the workload. The same workload for developing new colors, adjusting production batches, and approving colors is spread over fewer people. Staff become stressed and can easily overlook color shifts they might otherwise have caught.

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Tags: Color correction, Color difference, color development, color matching, color spectrophotometer

Report on the 11th AIC Colour Congress 2009 Sydney

Posted by Elaine Becker on Thu, Nov 05, 2009
The 11 th Congress of the AIC (International Colour Association) was held at the John Niland Scientia Centre, University of New South Wales in Sydney at the beginning of the month and was a highly successful event.

There were over 330 delegates of whom ~220 were from overseas in fact from 34 countries from most continents around the world.

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Tags: AIC Congress 2009, color congress, colour congress, color research

Installing OnColor Color Software under Windows 7 and Vista

Posted by Myron Langer on Thu, Oct 29, 2009

The OnColor  Suite of color QC and color matching software is licensed through use of a hardlock key.  The USB hardlock key that is shipped with the software can be used on one computer at a time. 

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Tags: OnColor, hardlock, Vista, Windows 7, color matching

Color Matching of Plastics and Coatings

Posted by Elaine Becker on Tue, Sep 22, 2009
The latest newsletter of the Color and Appearance Division of the Society of Plastics Engineers contained a noteworthy article that should be read by anyone involved in the coloring of plastics or coatings.  Bruce Mulholland of Ticona authors a technical article "Effect of Additives on the Color & Appearance of Plastics".  It can be found in the SPE CADNEWS Summer2009 starting on page 14 at:

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Tags: Color correction, color development, color matching

Connecting your color spectrophotometer to OnColor with a USB adapter

Posted by Tom Merck on Wed, Sep 02, 2009

Many color instruments and spectrophotometers in use today come with a serial cable to connect and communicate with a computer.  However, serial ports are a thing of the past and very few PC's come with a serial port as standard configuration these days.  While you can always install a serial port, an easier way to connect to the PC is to use a Serial to USB adapter.  This is a special cable that plugs into the serial port output of your spectrophotometer on one end and plugs into a USB port on the computer on the other.  This circumvents the need for a serial port on the PC. 

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Tags: OnColor, USB adapter, color spectrophotometer

How to improve Inter-instrument Agreement with Instrument Profiling

Posted by Elaine Becker on Thu, Jul 16, 2009
So many color disputes arise these days because color instruments don't necessarily read the same.  Electronic color standards are widely used and shared within a supply chain and have many benefits, but if all of your instruments are not regularly monitored and are known to read the same, then problems can arise. 

Many users assume that since they do a daily calibration on their instrument, their readings are correct.  And if they are correct, then they must match every else's.  That's not usually the case.  Spectrophotometers from different suppliers may read color differently.  Even with the same model from the same supplier, significant differences can be found depending on the age of the instrument and how well it is maintained.

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Tags: color tolerances, Announcements, instrument profiling, inter-instrument agreement

Color Correction – How to use your color software to get practical answers

Posted by Elaine Becker on Thu, Jul 16, 2009
Have you experienced a case where the color computer wants to double the batch size and add a ton of white to correct a batch?  Or maybe it's adding some red and you think the color is already too red? A common complaint about color matching software is that it gives bad answers or impractical adds to correct the color of a batch. 

Well...this frequently happens when a minor colorant is overshot in the batch and the only way the computer knows to correct it is to dilute it out by adding all of the other colorants.  Remember, the color computer is always trying to go for the perfect match or DE=0.00.  Often times this is not the "perfect answer" in the practical world.  The colorist is frequently able to accept a small color difference if he can fix the batch with the add of one colorant, or a small add of two colorants.    In these cases, using the manual correction features of OnColor can solve the problem by giving you control with practical choices on how to adjust the color of a batch.

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Tags: Color correction, color matching


Posted by Mike Burns on Thu, Jul 16, 2009

One of the more frequent questions we hear from suppliers is:  What should my color tolerances be?  The simple answer equates to what the client will accept in color variation in all directions of color space versus the color standard the supplier needs to match.  The importance of the client providing representative color standards will be the subject of a future blog.

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Tags: color tolerances, Announcements, Color difference, Product Information, box tolerances, CMC DE, DE CIE2000, elliptical tolerances, color standard