filter characteristic curve (In French courbe caractéristique du filtre) spectral transmittance of a chromatic filter – used in the past for the production of color separation prints and sometimes still in filter densitometers; wavelength maxima: red filter at 625 nm, green filter at 520 nm, blue filter 435 nm.
film for color slides/prints (In French film couleurs) obsolete recording medium in the form of the color negative film (for prints) and the color reversal film (color positive film, for transparencies).
field of view (In French champ visuel) solid angle which the resting eye detects; independent of the viewing distance.
extinction (In French extinction) Parameters in physical color mixing; (spectral) extinction is the negative logarithm of the (spectral) degree of transmission.
extender, thinning varnish (In French allongeant, vernis allongeant) binding agent used in particular by gravure printers for reasons of cost to reduce the concentration of pigments to a qualitatively acceptable level.
extended colors (In French couleurs X11) see web colors
exposure (In French insolation) process depending on light quantity, duration and sensitivity of the photo receiver (printing plate, sensor, CCD).
exposition (In French exposition lumineuse) product H of illuminance E and duration t [lux seconds = lumen × seconds / square meters].
Eurostandard (In French Eurostandard) a worldwide standardization concept developed by System Brunner which was geared to the Euroscale offset printing system during its introduction in 1975; a non-European version is being marketed as a global standard. Eurostandard was adapted to the technologies in prepress printing and printing, and in the printing process alone defines more than 30 influencing factors which can lead to color variations in the image. DuPont integrated the Eurostandard as a reference…
Euroscale (In French gamme européenne unifiée (GEU)) obsolete “European color scale” for book and offset printing; replaced between 1997 and 2002 in all printing processes by the ISO 2846 scale, for which the name Euroscale is still used frequently but incorrectly. In the USA everything which does not correspond to SWOP or G7 and is produced with a positive copy and a 60-L/cm screen is colloquially termed Euroscale.
EuPIA, European Printing Ink Association (In French EuPIA) CEPE working group of printing ink manufacturers; particularly important for printing food packaging are 2 guidelines for the production of printing ink for packaging.
Esko-Graphics (In French Esko-Graphics) Belgian software provider for the design of packaging/labels as well as digital printing; outstanding color products: Color Engine Pilot creates multi-channel ICC output profiles for offset and flexo printing with special colors; Kaleidoscope 4-D creates and manages brightness, glaze and chromaticness gradations of special colors in a database from which the spectral data for the ICC output profiles can be used; the flexo printing conversion module InkSwitch can optimize CMYK separations…
equidistant, uniform (In French équidistant) see sensationally equidistant
EPS, Encapsulated PostScript (In French EPS) platform-independent graphic form .eps in which ICC profiles can be embedded; contains vector/object, raster graphic, separation data and fonts, optionally also small preview images.
emission spectrum (In French spectre d’émission) degree of emission as a function of the wavelength. The spectral intensity distribution of light sources, monitors and other self-luminous objects is recorded by radio spectrometers, e.g. GL Optic by Just Normlicht. Some colorimetric measuring instruments – in particular those that are also used for calibrating monitors – can measure the emission spectra of monitors and standard illuminant lamps within the framework of their possibilities and from these calculate…
emission factor (In French émissivité) quantity of radiation which a body releases in comparison to the ideal Planck radiator at the same temperature; radiance per exposed surface from 0 “no radiation, cold” to 1 “equally intensive”.
emission (In French émission) 1) emission of radiation from all primary sources (sun, fire, lamps, LEDs, laser, monitors, projectors, cold light). 2) release from printing ink and auxiliary substances of substances that are health hazards and environmentally harmful, to be prevented by the manufacturer or compensated for by technical printing processes, e.g. volatile organic compounds (VOCs), photo-initiator fission products (with UV inks) and ozone, as well as the prevention of ink mist/splashes which make the…
embedding, tagging (In French incorporation) the anchoring of ICC device profiles in image, graphic and document files; the profiles remain extractable.
elementary hue (In French teinte élémentaire) designation for the pure hues of the opponent-color elementary hue system with the symmetrical opposites red-green and yellow-blue (RG, JB); they are mutually exclusive, that is, they have no parts of their neighboring elementary hues. The chromaticity charts a*;b* in CIELAB and u*;v* in CIELUV are based on this idea. CIExyY (1931) colorimetric values for D65/2°: “elementary yellow J” x =0.4449, y = 0.4909, Y = 77.82; “elementary red…
electron beam curing/EBC inks (In French encres EB/séchées aux radiations) printing inks which cure through the influence of radiation from an electron beam source (tungsten cathode, Compton wavelength: 0.0024 nm) in an inert gas protective atmosphere. The ionizing effect is so strong the no photoinitiator is required to trigger the cross-linking reaction; application printing germ-free pharmaceutical packages.
