Newsletter nº 3
How can Light influence Color?
Rigor is the motto that accompanies us. GLOMA®, Lda has an automatic light booth in the paint tuning laboratory, with the possibility for the customer to choose the light source for the color evaluation.
Color is a subjective sensation created by the interaction of light with materials. It is essentially dependent on three factors: light source, object and observer.
Evaluating colors visually requires two fixed constants – vision angle andlighting.
In order to guarantee colorimetric control with greater precision and quality, we purchased this light booth, which was developed to reduce variations in visual color analysis. The cabin has a neutral internal color pattern that does not interfere chromatically with the observer.
However, there are many sources of light available that emit energy differently. The lighting directly influences the color of the objects, thus presenting significant changes in appearance when subjected to different light sources To reduce this complexity, some sources have been standardized for certain applications.
The sources we have available are:
- D65 – Daylight at 6500K, widely used in colorimetry.
- D50 – Daylight at 5000K, used in graphic arts.
- Typical incandescent lighting in homes and offices (domestic light).
- TL84 – Typical fluorescent lighting in stores (stores lights).
- UV – Necessary lighting for fluorescent and phosphorescent pigments.
The D65 source, according to current standards, is the standard source for color evaluation in most applications, especially in the textile industry. Therefore, if others are not requested, this will be the light used, by default, for the creation of colors in GLOMA®.
