renotation (In French renotation) further development of a color system through recalculation or correction.

rendering intent (In French intention/mode de rendu) regulation for gamut mapping to be selected within the framework of color management; four regulations are distinguished in the ICC profile format specification: absolute match (absolutely colorimetric, exact 1:1 color communication), reference match (relatively colorimetric, exact color communication with respect to white point of the output medium), saturation match (maintains saturation) and perceptual match (perception-related, photographic, taking account of environmental influences like the viewing environment to be assumed).

remote inking adjustment/control (In French commande à distance de l’encrage) present in all printing presses with a central control console on the front edge of which the color control desk is located, with the ink key pushbuttons +/–.

remitting colors (In French couleurs réfléchies) opaque colored substances or surfaces whose color stimulus is determined by the absorption or remission properties of their colorant (pigments, dyes) and the illuminant; the color synthesis model for remitting colors is C+M+Y, supplemented in printing by black K.

remission spectrum (In French spectre de rémission) see spectral luminance factor.

remission (In French rémission) controversially defined phenomenon describing the casting back of light waves and simultaneous weakening of the luminous flux (see reflection). In accordance with the understanding of remission in colorimetry (see spectral luminance factor) the following distinction can be made: Remission is the emission of radiation by all secondary radiators. Only the spectral elements of the irradiated light that are not absorbed by a surface are remitted by this surface, e.g. red surfaces…

relative spectral radiation distribution curve (In French répartition spectrale relative d’énergie) standardized spectral intensity distribution S(λ) of a light source, measurable for example with a Just GL Optics mini-spectrometer.

relative print[ing] contrast quality parameter in the printed image which can be determined by means of a densitometer; calculated from the difference between solid density and screen density, divided by the solid density.

regime of measurement (In French géométrie de mesure) sequence of a measuring operation within a system purpose; distinctions are made between offline measurement (obtaining and showing measured values), online measurement (measured values are also used semi-automatically, “open loop”, régulation à boucle ouverte), nearline measurement (like online measurement, but in absolute spatial proximity to the other service systems, e.g. at the printing press control panel), inline measurement (obtaining machine-integrated measured values and using them fully automatically;…

reflective original/copy (In French document à réflexion, document opaque) repro copy that can be processed in on-light mode; opposite: transparent copy (transparency).

reflection (In French réflexion) controversially defined phenomenon describing the casting back of light waves and simultaneous weakening of the luminous flux. 1. Illogical differentiation in designation between specular/regular reflection (réflexion spéculaire/pure) as “reflection” and diffuse reflection (réflexion diffuse) as “remission”, which is why the bvdm only mentions reflection in its German Media Standard Print. 2. What speaks out against this, however, is the worldwide common designation “spectral remission factor”, which results from the measurement of…

reference stimulus (In French stimulus de référence) color stimulus that serves as a reference for a color measurement in a sample; for color measuring instruments themselves, the reference stimulus is the absolute white standard.

redness (In French dominante rouge) in the sense of opponent color theory, the hues of the red area vis-à-vis the green tones; in CIELAB a*>0; see also blueness, yellowness, greenness.

recycled grades (In French papiers recyclés) paper/cardboard with a high proportion of recyclable fibers; modern recycled products, for example this brochure printed on Arjowiggins recycled paper, have overcome previous disadvantages like a yellow-brownish to gray color cast in paper white, or whiteness fluctuations, and today offer a basis for stable color rendering for the entire production run.

recipe dyeing (In French coloration) dyeing of objects according to recipe (e.g. textiles, paper, glass, plastics, liquids).

RAW format (In French format d’image RAW) generic term for RGB raw data formats of digital cameras.

raster image, bitmap (In French image en mode point) digitally implemented continuous tone image in pixel structure.

RAL Design System, RAL-DS (In French système RAL) color sample system introduced by Ludwig Gall in 1993 for varnishes and paints in product and room design, e.g. car body paints, painting materials or textile colors. Gall extended the RAL 840-HR from 194 to 1688 color shades and placed it on a CIELAB and/or CIELCH basis (written HLC, maximum 80 grades), whereby all neighboring color samples have a color difference of ΔE*ab = 10 with respect…

radiation-curing (In French séchage par rayonnement) principle of film formation in printing inks whose binding agents link up through the influence of UV or electron beams (ESH).

radiation (In French rayonnement) electromagnetic waves characterized by wavelength or their reciprocal frequency, intensity, density, spectral composition and thus also their interactions with the environment. Photometric factors are special cases of radiation field factors: Q = luminous energy quantité de lumière [lumen × second] = radiant energy énergie rayonnante [joule] Φ = luminous flux flux lumineux [lumen] = radiant power/flux puissance rayonnante, flux énergétique [watt] I = luminous intensity intensité lumineuse [candela] = radiant intensity…