Kigle-Bockler G.,BYK Gardner GmbH |
Folkerts H.,BYK Gardner GmbH
Polymers Paint Colour Journal | Year: 2011
Several new testing technologies that have been introduced to measure the current special effect pigments are discussed. The application method for the basecoat is being changed to 100% electrostatic application in order to increase paint efficiency. Metallic finishes containing coarser aluminum flakes will show more non-parallel oriented flakes that results in a less light-dark flop and more sparkling at a low grazing illumination angle. Sparkle and graininess are essential parameters for automotive applications to achieve a harmonized look over the entire car body including add-on parts. An additional factor influencing total color impression is an effect called cloudiness or mottling. Cloudiness is a lightness variation on light metallic finishes and mottling is a very undesirable effect on large body panels. It is necessary to measure lightness variations over a large sample area in order to measure the mottling effect.
Kiale-Boeckler G.,BYK Gardner GmbH |
Weixel S.,BYK Gardner GmbH
Paint and Coatings Industry | Year: 2010
Special-effect finishes are used in many applications to create new color impressions, pronouncing the design of a product and at the same time making the product appear alive. The color impression of effect finishes can not only change under different viewing angles but can also look different depending on the lighting conditions. Therefore, new generations of special-effect pigments can no longer sufficiently be described with traditional multi-angle color measurement quantifying the diffused light reflection at 3 to 5 angles. This paper presents new technologies that were developed to objectively describe the total impression of color- multi-angle color and effect changes (sparkle - graininess) as well as paint defects such as "cloudiness - mottling".
Byk Gardner Gmbh | Date: 2015-06-24
A multiple-stage method of determining surface properties, with the steps: When the value which is characteristic of this optical property is determined, the topographical property of the region is taken into consideration.
BYK Gardner GmbH | Date: 2016-07-21
An apparatus for the calibration of optical measuring instruments with a carrier includes a calibration body having a glass body which has at least one scattering element, wherein the scattering element is completely surrounded by the glass body, and wherein a degree of transmission of the scattering element and of the glass body differ from one another.
BYK Gardner GmbH | Date: 2015-01-23
An apparatus (1) for the calibration of optical measuring instruments (10) with a carrier (2). According to the invention the calibration body (4) has a glass body (4) which has at least one scattering element (42), wherein this scattering element (42) is completely surrounded by the glass body (4), wherein a degree of transmission of the scattering element (42) and of the glass body differ from each other.
BYK Gardner GmbH | Date: 2015-03-12
The invention relates to an apparatus for the investigation of surface properties with a housing, a light source which directs light through an opening in the housing onto a surface to be investigated, with a first detector device which is arranged inside at a first pre-set angle with respect to the light beam radiated onto the surface by the light source, with a second detector device which is arranged at a second pre-set angle with respect to the light beam radiated onto the surface by the light source and with a third detector device which is arranged inside the housing at a third pre-set angle with respect to the light beam radiated onto the surface by the light source. According to the invention the apparatus has at least two filter elements with optical properties which are different from each other which are arranged on a common carrier movable with respect to the light source, in such a way that each of these filter elements is optionally capable of being brought into a beam path between the light source and the surface.