Figure 2 show the printable color gamut of three commercial printers and Table 1 show the gamut volumes of them. Results represent the gamut achievable with the given printer. Therefore the achievable or reproducible color gamut for Konica Minolta CF3102 is significantly larger than two other printers especially in yellow region for paper A as commercially available paper. In the case of the Konica Minolta Bizhub C450 and Konica Minolta bizhub C451, the Konica Minolta bizhub C451 has larger gamut volume although Konica Minolta bizhub C450 has larger color gamut in blue and magenta area. Figure 2 show printers produce relatively different color gamut shape. As mentioned before comparing the results in terms of gamut volume show, Konica Minolta CF3102 printer has larger gamut volume for the selected paper A. Therefore this printer chooses for investigation the effect of paper characteristics in printable color gamut and reproducibility.
Effect of paper characteristics on color gamut
Figure 3 illustrate reproducible color gamut comparison in CIELAB space for six diffrented papers printed via Konica Minolta CF3102. All papers have relatively same gamut shape but different in gamut volumes. Color gamut volumes of different papers calculated from figure 3 are shown in Table 2. The lowest gamut volume related to paper B and C which specialized from other papers with their lowest paper whiteness. Whiteness is the measured reflectance across all wavelengths in the visible-light spectrum (380-780 nm) and provides information about the color reproduction capability of paper.
The CIE whiteness formula is the most accepted and frequently-used for paper whiteness. Paper whiteness is calculated using equation 1:
W=Y10+800(xn10-x10) +1700(yn...
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...e Eye-One GretagMacbeth spectrophotometer, GretagMacbeth ProfileMaker Pro and CHROMiX ColorThink Pro software was used to generate the gamut volume from printed ECI2002R CMYK chart. Atomic force microscopy, spectrophotometer and Goniophotometer were used to measure the paper roughness, whiteness gloss and color properties. The results show that printer type and paper properties have significant effect in reproducible color gamut. Result show that Konica Minolta CF3102 has significantly higher gamut volume especially in yellow region than two other printers (Konica Minolta bizhub C450 and the Konica Minolta bizhub C451). It was found that paper with high whiteness, low surface roughness, and high gloss exhibited a high gamut volume. The results show that low whiteness of paper affect the positive effect of high gloss and low roughness in increasing the gamut volume.
This is a written report where my partner on the topic and I presented a ten minute oral summary of our chosen research topic on Technicolor. We chose Technicolor as we felt it had most to say to us, threw the progression of the technology the problems threw out the years of perfecting the technology, to the ultimate glory of the Technicolor experience.
The inks are not pure substances since the pigments get separated along the filter paper.
These days, forests are very important in maintaining biodiversity. It provides lots of oxygen and takes a big role in our life as well. The tropical forests of the earth are nearly immeasurable riches such as they are home for many people, as well as uncountable animal and plant species (National Geographic, n.d.). Furthermore, they contribute to air circulation, maintaining water quality and global climate stability. In spite of providing many advantages, it also has many disadvantages such as people using the trees for furniture and cutting off the trees for making paper. Deforestation is happening because of the paper industry use the trees to produce the paper. Moreover, paper industry in Indonesia has commonly destroyed the environment. The demand for paper consumption has been increasing rapidly day by day. Because of the paper demand is increasing, it also makes many people start to cut off tress for business purposes w which means it could be dangerous for our environment in the future. In this essay, I would like to emphasize and focus on about paper consumption and the impacts on environment in Indonesia.
Paper Chromatography is an analytical technique for separating and naming mixtures that are or can be colored, especially pigments. This process can be used in secondary or primary schools in ink experiments, but this method has been largely replaced by thin layer chromatography; however, it is still a powerful teaching tool. Two-way paper chromatography, also called two-dimensional chromatography, involves using two solvents and rotating the paper 90⁰ in between. This method is useful for separating complex mixtures of similar compounds, for example, amino
Unlike inkjets, the media type used in the ColorWave does not determine the final print quality. This is because CystalPoint technology enables the toner to instantly crystalize on the surface of the print media. Comparatively, Inkjet plotters require the ink to be absorbed into the media. This is why full-color inkjet prints look horrible on lower grade papers. A heavier weight substrate is needed to fully accept the extra ink needed for maps and posters. Conversely, ColorWave Océ plotters are capable of printing full-color posters on regular, 20-pound engineering bond without sacrificing any print quality.
Scigliano, Eric. "The Tide of Prints." Technology Review 102.1 (1999): 62-67. Applied Science & Technology Full Text (H.W. Wilson). Web. 18 Nov. 2013.
We took pictures of each other’s data once finished with the lab. For the paper chromatography, students began by grinding 5g of spinach along with 2g of anhydrous magnesium sulfate. Students added hexanes and acetone as specified by the lab protocols. Once, the solvent was a dark green color, we placed it in a centrifuge and transfer the liquid portion of the solution into a test tube. Throughout this portion of the experiment, students used weighting paper as a funnel poring the indicated solution as stated by the protocol, for instance pouring silica gel and sand into the column. After, we poured about 3ml of Hexanes into the column, making sure not to let the column dry. We then added, spinach extract to the column—after, we added about 1ml of hexanes. Adding hexanes caused the solution to gain a yellow colored band. We added hexanes until the yellow band reached the bottom of the column, thus began to collect all the yellow pigment into a test tube. Once the elutant become colorless, we once again placed a waste basket under it. Finally, we collected the green pigment into another test tube by a 70%/ 30% mixture and a bit of acetone. Once the two colored bands were collected, we obtained the wavelengths of each colored band using the
To identify inks of similar color from one another from mere observation is near impossible since colors can look identical to the human eye while differing in composition. Therefor, further examination of the components of the ink is needed. Ink is a mixture of substances and these substances have varying molecular polarities. The intrinsic properties of the components of the ink allows for the separation of ink through adsorption chromatography, where the ink is separated based on the attraction to a moving phase (liquid) and stationary phase (TLC plate). Using the Rf equation, the Rf value can be determine to numerically determine the similarity in the inks
Goyal Hari. (2000). Properties of Paper. In Pulp & Paper Resources on the Web. Retrieved January 24, 2010, from http://www.paperonweb.com/paperpro.htm.
The basic process of making paper has not changed in more than 2000 years. It involves two stages: the breaking up of raw materials in water to make a suspension of individual fibbers and the formation of felted sheets by spreading this suspension on a porous surface, to drain excess water. The essential steps of papermaking by machine are identical with those of hand papermaking just much more complex. The first step in machine papermaking is the preparation of the raw material. For centuries, the main raw materials used in papermaking were cotton and linen fibbers obtained from rags. Today more than 95 percent of paper is made from wood cellulose. Wood is used mainly for the cheapest grades of paper, such as newsprint. Cotton and linen fibbers are still used for high quality writing and artist’s papers. Many kinds of wood can be used such as aspen, beach, birch fir, gum, hemlock, oak, pine, and spruce.
Determining dot gain, print contrast and ink trap allows us to analyze press sheets and colour bars to find the most favourable running conditions to reproduce a proof for a job. In order to retrieve these print characteristics, multiple density readings are taken with a densitometer from the print control strip to interpret values and use them to asses quality. Dot gain (or tonal value increase) is the increase in the size of a printed dot from plate to press sheet (also in prepress from file/film to print). Dot gain occurs in every printing process and are “most visible in the midtones and deep shadows” (Lawler, 1995), by testing gain and using the dot area equation – a set of adjustment values can be decided upon for how to print the rest of the job. Proofs with high contrast have greater shadow detail - d...
Matt lamination – Matt lamination is a flat finish on the printed papers, that gives it that “matt” effect. It’s very durable and stops cracking and marking, thus giving a longer lifespan to the print.
...eryone is familiar with since just about everyone has one in their homes nowadays. Inkjet printers are the common household printer and the largest form of printing today. Inkjet printers replicate an image on paper by shooting droplets of ink onto paper. Most early inkjet printers only used two ink cartridges, one for black and one for color, but today a majority of inkjet printers use 4 cartridges; CMYK (cyan, magenta, yellow, and black). Then there are printers that are more intended for printing photos that can take up to 8 cartridges which include greys and lighter colors. From inkjet we move to laser printing, which is a digital process. Unlike inkjet printing which uses ink cartridges Laser uses larger cartridges called toner.
...linder. We let it dry and then we repeated the application of the extract on the pencil line up to four times. Make sure the band of pigments are really dark. The following steps were performed in a hood. Following the previous step, we placed the pigment extract to chromatographic paper that was in a cylinder. The cylinder then will be placed in a jar with petroleum ether and acetone. Let the chromatography advance 3 cm over the cylinder. Lastly, the cylinder was taken out from the jar. When analyzing the paper chromatography, golden yellow represented carotene, pale yellow represented xanthophyll, green grass represented chlorophyll a, and yellow- green represented chlorophyll b. Chlorophyll b was all the way at the bottom of the paper making it the most polar and the least soluble in the solvent. Carotene was the most nonpolar and the most soluble in the solvent.
A colorimetre is an instrument that distinguishes colour samples to provide a measure of the colour’s description. It allows the absorbance of a solution at a certain colour of visual light to be determined. Colorimeters measure change as they determine the concentration of unknown solutions as they are relative to the absorbance.