Color & Light Knowledge

UV LIGHT IS INVISIBLE
Nonetheless it influences the final appearance of printed products. Therefore it is vital to know the final viewing conditions where the products are meant to be used. As this is rarely possible the printing industry established standardized viewing conditions which are used for the visual appraisal of original and production.

Why do values measured on two spectrophotometers differ?
Even more so as they get more different?
Which factors affect the precision of values measured
in colour quality control?

This article shall help you to shed some light into this darkness.

Understanding the difference between a lightsource and an illuminant may sound trivial but needs clarification nonetheless.
Even if these terms are clear there might be confusion about choosing the correct illuminant for a professional color quality control.
This document provides an overview concerning the standard illuminants on the market.

The evaluation of whiteness of a product raises a lot of questions.
This document provides an overview concerning “whiteness” and the use of UV reference standards.

Part 1 : Let's study color.
Part 2 : Let's study color in a little more detail.
Part 3 : Basic Knowledge for Spectrophotometer selection.
Part 4 : Color terms

1. The right choice of measuring geometry

2. You cannot switch off the Measuring Geometry

3. The Five Geometries of Reflection Measurement

4. The three geometries for transmission measurement

5. Which Measuring Geometry is best?

6. Expert Consultancy by Konica Minolta

1. How important is resolution when selecting a spectrophotometer?

2. More important than resolution…

3. …is the accuracy of measurement

4. Is the half-intensity bandwidth of the monochromator correct?

5. Rustling in the tree top…

6. Other parameters…

1. Introduction
2. Concepts
3. Instrumentation
4. Conclustion
5. References