This study focuses on the properties of reflection and absorption of light in the visible and near infrared range of acrylic dyes and related materials for coloring. The research aims to understand ...the use of acrylic dyes in fine arts and to simulate these dyes for printing purposes. Two groups of acrylic dyes were studied using spectroscopy to determine their light absorption properties in the visible (VIS) and near infrared (NIR) regions. The measurements were performed with forensic cameras equipped with 24 light filters in the range of 400–1000 nm. The results of the digital recordings were compared with video surveillance cameras that operate and record during the day and night. The same color had at least two formulations of dyes for print reproduction to simulate what the naked eye sees and to simulate light absorption in the NIR spectrum. The study aimed to gain a deeper understanding of the properties of acrylic paints and related materials, considering how they can be used in fine arts and how to simulate them in printing.
In the security managing of packaging infrared transparent graphics on polypropylene material is involved. Preparing of dual images of objects, textual messages in visual-V and NIR-Z domain is ...extended with dual separation which defines new flexographic procedures of colour mixing. Profiles describing and defining V and Z twin pairs are strictly associated with printing conditions. Quality of twin pairs is achieved with spectroscopic analysis of measuring light absorption in visual and near infrared spectrum. Halftoning algorithms support transparent flexographic foil that does not absorb printing inks and does not penetrate into the printing media. Line halftoning element with ''knee'' effect is developed to additionally demonstrate the plasticity of primary objects or letters. The balance between equalizing of inks in the visual domain, and their differentiation in NIR-Z spectral domain is achieved. Relatively coarse shape and structure of screening elements, low ruling, is suitable for additional transparency of graphics, so that the underlying goods packed in foil can be observed. Secondary, hidden graphics is accessible through NIR camera technology. In that way multiple security options are ensured.
► Value Z is added for color description for managing dual color properties. ► It is the numerical value of matter absorption in the NIR-Z spectrum. ► It is suggested to incorporate Z values in all ...commercial inks. ► Inks are planned for two independent graphics, each in its own wavelength area. ► The new application of inks in industrial, art and security purposes is achieved.
In this paper value Z is introduced into the physics of describing material light absorption in the sub-area of the near infrared (NIR) spectrum ranging from 1000nm to 1100nm. This value is added to the standard parameters for color description for managing dual color properties. The basic challenge is in grouping together the infrared technology of manipulation with inks and ink characteristics in the visible spectrum (VS) in order to design new inks, with the goal to create hidden, invisible and double information. The value Z is the numerical value of absorption in the NIR-Z spectrum from matter, ink and pigments, as well as from flora and fauna. It is introduced into standard colorimetric defined by three parameters (CIELab, RGB, HSB) as the fourth value with the assertion that there is no correlation between them and parameter Z. It has been proven experimentally that if there is a default fourth value Z, the desired ink color can be set in the visible spectrum in a single manner only. The significance of the four-parameter color LabZ (RGBZ, HSBZ) system is in the new approach to application of spot inks and pigments in visual arts (paintings), industrial and military application, as well as in security graphics designed with printing technologies.
A near infra red (NIR) designed image is a dedicated image containing additional information in a spectral domain between 700 and 1000 nm. Through-out management in visual spectrum z-parameter ...properties of selected separation or custom dyes are adjusted for NIR visualization. If such reproduced image is rescanned, Z-parameter properties of a CMYKIR designed image vanishes, or is seriously damaged
Extended colour management is introduced for integrating the colorants visual characteristics in the visual, but also in the near infrared spectrum (NIR). Many conventional graphic inks are such that ...their light absorption in the visual (V) and NIR specter can be very well measured, and we are using this for our goal which is the following:firstly to create a double condition of graphic reproduction - invisible graphics to the human eye, but allowing to be registered by instruments measuring in the NIR area. The second goal is to design graphic elements that are not recognized in the NIR specter, but are visible so that we can see them. And thirdly: to produce a “double image” with conventional graphic inks, but in such a way that each image is recognized only in the previously set wavelengths.This approach introduces modified learning on graphic arts separation where two independent images are joinedin creating CMYK printing channels. The second image as a gray record is the desired black component (K) in the first visible spectrum image. The standard colour management ends in the visible space (1) but with the help of inks management, a second hidden image can be developed in the NIR space. Channel K acquires a new meaning. It is the carrier of its own information in image and text form.
Topographic Maps with Infrared Colors Vujić, Jana Žiljak; Matas, Maja; Pogarčić, Matej ...
Procedia engineering,
2015, 2015-00-00, Letnik:
100
Journal Article, Conference Proceeding
Recenzirano
Odprti dostop
We are introducing infrared security print as an extension for topographic map print. The article carries out the algorithm of merging several layers of spot colors. We expand the spectral analysis ...of dyes to the near infrared spectrum. Today's technology of topographic map multiplication uses spot colors defined by experts in the state geodetic bureau. The state map production is strictly defined by law. That indirectly emphasizes the need to protect the data displayed on produced maps. We suggest, while creating maps, adding infrared properties to the colorants for the authentication of every edition. As the official geodetic practice set RGB color values, it is possible to carry out double printing colorants for these colors, which have the same response in the visual spectrum and a different in the infrared spectrum. Based on the equalization of spectrum pairs of dyes in the visual part, a proposal was given for the degree of light absorption in the infrared region. Every publisher, printer, expert from the state geodetic bureau, determines his own level of infrared safety component participation. Such a map cannot be changed, ie; forged, thus ensuring full protection for all topographic data contained on the state map. Infrared dyes property disappears in an attempt of recording, scanning, or any other technology that allows reproduction. The visual state of the topographic map with infrared colors, is the same as the visual state of the map without the IRD extension. With this procedure there is no interference with the visual art on the map. This method of printing also allows creation of maps, with pieces of information in the visual spectrum that may not be the same as the content of information in the infrared spectrum.
U ovoj patentnoj prijavi razvili smo i ponudili primjenu ideje ugradnje infracrvene grafike u programsko sučelje (PostScript driver). Svaki izlaz iz računala prema pisaču će sa sobom donjeti ...sigurnosnu grafiku bez obzira da li to pošiljalac želi ili ne. IRD grafika može biti znak, mala vinjeta programirana u vektorskom ili piksel obliku. S izumom „IRDMark“ se štiti otisak, pošiljaoc i računalna baza informacija. Inovacija IRDMark trajno povezuje računalo i pisač a programirani znak se nalazi na svakom otisnutom listu papira.
Skrivena slika po postupku INFRAREDESIGN® ugrađuje se u proizvode od kože i tekstila. Noviji modeli velikih pisača imaju i osam bojila koja su detaljno istražena obzirom na odazivanje u vizualnom ...(VIS) i bliskom infracrvenom spektru (NIR). Novi dizajn uvodi sliku, nazvanu „Z“ koja se gnijezdi u tisak kao skrivena od gledanja golim okom. Slika Z se prepoznaje s NIR kamerom. Novi proizvodi proizvedeni s postupkom ove patentne prijave nose elemente zaštitnog tiska čime se proširuju metode forenzičkog utvrđivanja autentičnosti originala. Štiti se autor i vlasnik uradaka od tekstila i kože.
Na svjetskim salonima inovacija, izumi zajedničkog naziva INFRAREDESIGN® nagrađeni su u posljednjih desetak godina sa preko 80 nagrada. Međunarodni stručni žiri, u svakoj od pojedinih zemalja, ...pokazao je iznimno zanimanje za nova rješenja koja spajaju znanost i umjetnost, a koja uključuju temu sigurnosne grafike. U velikim svjetskim gradovima kao što su Ženeva, Moskva, London, Taipei, Seul i Pittsburgh, izumi su na većini izložbi osvojili zlatna odličja i posebna priznanja.
PDF
