Characterization of coated prints with microcapsules

U disertaciji su predstavljena istraživanja koja imaju za cilj da se ispita na koji način i u kojoj meri različite tehnike, podloge i lakovi za oplemenjivanje, kao i kako različite masene koncentracije mirisnih mikrokapsula u lakovima utiču na najbitnija fizička, mehanička, optička i funkcionalna svojstva otisaka oplemenjenih mirisnim mikrokapsulama, kako bi se delovanjem na odgovarajuće parametre pripreme i aplikacije mirisnih mikrokapsula unapredio kvalitet oplemenjenih otisaka na ovaj način. Analizom rezultata istraživanja je utvrđeno da se oplemenjivanjem otisaka na ovaj način u značajnoj meri utiče kako na optičke, kao najvažnije karakteristike štampanih otisaka, tako i na njihove druge bitne karakteristike.This thesis presents research which aims to investigate how and in what extent different techniques, substrates and varnishes for the coating process, as well as how different concentrations of fragranced microcapsules in the varnishes affect important physical, mechanical, optical and functional properties of the coated prints with fragranced microcapsules. Information obtained by this characterisation will enable improvement of the quality of the coated prints with fragranced microcapsules by altering the parameters related to the preparation and the application of the microcapsules. The analysis of the obtained results showed that the coating of the prints in this way, significantly affected not only optical, as the essential characteristics of the prints, but the other important properties

Characterization of coated prints with microcapsules

U disertaciji su predstavljena istraživanja koja imaju za cilj da se ispita na koji način i u kojoj meri različite tehnike, podloge i lakovi za oplemenjivanje, kao i kako različite masene koncentracije mirisnih mikrokapsula u lakovima utiču na najbitnija fizička, mehanička, optička i funkcionalna svojstva otisaka oplemenjenih mirisnim mikrokapsulama, kako bi se delovanjem na odgovarajuće parametre pripreme i aplikacije mirisnih mikrokapsula unapredio kvalitet oplemenjenih otisaka na ovaj način. Analizom rezultata istraživanja je utvrđeno da se oplemenjivanjem otisaka na ovaj način u značajnoj meri utiče kako na optičke, kao najvažnije karakteristike štampanih otisaka, tako i na njihove druge bitne karakteristike.This thesis presents research which aims to investigate how and in what extent different techniques, substrates and varnishes for the coating process, as well as how different concentrations of fragranced microcapsules in the varnishes affect important physical, mechanical, optical and functional properties of the coated prints with fragranced microcapsules. Information obtained by this characterisation will enable improvement of the quality of the coated prints with fragranced microcapsules by altering the parameters related to the preparation and the application of the microcapsules. The analysis of the obtained results showed that the coating of the prints in this way, significantly affected not only optical, as the essential characteristics of the prints, but the other important properties

Print Quality of Ink Jet Printed PVC Foils

Digital printing technique is used for a wide variety of substrates, one of which are PVC foils. Samples used in this research were printed by digital ink jet printing technique using Mimaki JV22 printing machine and J-Eco Subly Nano inks. As printing substrates, two different types of materials were used (ORACAL 640 - Print Vinyl and LG Hausys LP2712). A test card consisting of fields of CMYK colours was created and printed, varying the number of ink layers applied. Samples were exposed to light after the printing process. Spectrophotometric measurements were conducted before and after the light treatment. Based on spectrophotometricaly obtained data, colour differences ΔE2000 were calculated. Results showed that increasing number of layers, as well as the right choice of substrates, can improve the behaviour of printed product during exploitation

ANALIZA PARAMETARA KOJI UTJEČU NA KVALITETU TISKA DOBIJENOG TEHNIKOM SITO TISKA NA PVC FOLIJAMA

Screen printing technique is used to apply transfer images to a wide variety of substrates. PVC foils can also be used as substrates. In the screen printing process on PVC foils different type of substrates, inks, as well as different mesh types, can be used. In this research, we used two types of substrates (ORACAL 640 - Print Vinyl and LG Hausys LP2712), three different kinds of ink (Hi-Gloss 35 000, 85 000 and Ondaflut Texilon 58.000), and screens with three different mesh counts (77, 120 and 140 n/ cm). These substrates are exposed to various environmental factors including, light, etc. The aim of this paper is to determine differences between samples caused by variation of mentioned parameters on lightfastness.Tehniku sito tiska karakteriše sposobnost tiska na velikom broju različitih podloga, pa se tako ovaj postupak tiska primjenjuje i pri tisku PVC folija. U procesu tiska na ovu vrstu podloge, može se vršiti varijacija različitih procesnih parametara, kao što su podloge, boje i gustine tkanja sita. Upravo zbog toga u ovom istraživanju korištene su dijve vrste tiskarskih podloga (ORACAL 640 –Print Vinyl i LG Hausys --------+LP2712), tri različite vrste boje (Hi-Gloss 35.000, Ondaflut 85.000 i Texilon 58.000), kao i sita sa tri različite gustine tkanja (77, 120 i 140 n/cm). PVC folije koje su predviđene za aplikaciju na vetrobranska stakla izložene su vremenskim uslovima. Cilj ovog rada je da se utvrdi, koliko će se postojanost uzoraka na svjetlost razlikovati ukoliko se promene parametri podloge, vrste boje i gustine tkanja sita

The heavy metals in the processing screen printing inks

The contents of heavy metals were analyzed in the two types (solvent-based and water-based) of processing screen printing inks. Mass concentrations of heavy metals (copper, iron, zinc, manganese, chromium, nickel, cadmium, and lead) were determined in the tested screen inks by combining the gravimetric method and atomic absorption spectroscopy. The results indicated that the measured mass concentration of copper (2049.9 mg kg-1 ) in solvent-based cyan ink is 2.4 times higher than in water-based cyan. Other detected metals show higher concentration values with water-based processing inks

The characterization of microcapsules printed by screen printing and coating technology

Depending on the microcapsules functionality, i.e. encapsulated core material, nowadays microcapsules are used in various fields of application, such as in medicine, pharmacy, agriculture, construction industry, chemical industry, food industry, biotechnology, electronics, as well as in printing and textile industry. In order to fulfil their basic purpose, microcapsules have to be transferred onto the target areas of the substrate material without damage, using different deposition techniques, mostly coating and printing techniques. The aim of this research is to firstly investigate the physical characteristics of the two selected fragranced microcapsules, applied by screen printing and coating technique, and secondly to determine how their addition in the selected three varnishes affected the basic characteristics of the prints. Fragranced microcapsules were before printing and coating adequately premixed with the selected varnish. The research revealed that the characteristics of the fragranced microcapsules and the varnishes as well as the used application techniques significantly affected the behaviour of the fragranced microcapsules and their deposition in the printed varnish layer as well as on the characteristics of the prints

Washing treatment impact on print quality of screen printed knitted fabrics

The surface of textile materials is highly textured, commonly in non-uniform ways. Because of this texture effect, textile surface appears rougher and more porous than other printing substrates, which can cause excessive ink penetration during printing process. Next, washing process is very important factor because it influences ink characteristics on printed samples as well as structural changes of the textile substrate. The aim of this paper is to determine the influences of washing process and different mesh tread count used for printing on print quality. This will be obtained by using spectrophotometric analysis, and GLCM image processing method for print mottle estimation. The results of this research show that increasing number of washing processes leads to higher color differences reproduction color in comparison to printed materials before washing. It also shows that textile surface texture has a great influence on print mottle as well as that number of washing treatment series can generate variations of solid-tone print uniformity. Keywords: cotton, different thread count, GLCM, spectrophotometric analysis, series of washing process

The influence of heat treatment on the quality of screen printed textile substrates

During exploitation, textile products printed with screen printing technique are quite often exposed to variousinfluences, one of which is a heat treatment- firstly during the production process and later on when ironing.Heat is simultaneously affecting deposited colorants (ink) on the surface of the substrate material, as well astextile fibers in the material structure. As a result, colorimetric characteristics of printed colorants arechanged. The research presented in this paper aims to determine the influence of heat treatment on colorchanges of screen printed textile substrates, observed in CIE L*, a*, b* color space. Macro non-uniformity ofthe printed cotton textile materials was analyzed as a function of temperature levels applied during thermaltreatments and textile material characteristics, as well as mesh counts of screens used in the printing process.The results show that thermal treatment affects the color change of printed samples

Washing treatment impact on print quality of screen printed knitted fabrics

The surface of textile materials is highly textured, commonly in non-uniform ways. Because of this texture effect, textile surface appears rougher and more porous than other printing substrates, which can cause excessive ink penetration during printing process. Next, washing process is very important factor because it influences ink characteristics on printed samples as well as structural changes of the textile substrate. The aim of this paper is to determine the influences of washing process and different mesh tread count used for printing on print quality. This will be obtained by using spectrophotometric analysis, and GLCM image processing method for print mottle estimation. The results of this research show that increasing number of washing processes leads to higher color differences reproduction color in comparison to printed materials before washing. It also shows that textile surface texture has a great influence on print mottle as well as that number of washing treatment series can generate variations of solid-tone print uniformity. Keywords: cotton, different thread count, GLCM, spectrophotometric analysis, series of washing process