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1 – 10 of over 56000Lijun Chen, Zhongbin Bao, Zhengrong Fu and Wen Li
The purpose of this research is to prepare a dispersion resin with good dispersity and a colour paste with good stability. At present, the colour paste is being prepared using the…
Abstract
Purpose
The purpose of this research is to prepare a dispersion resin with good dispersity and a colour paste with good stability. At present, the colour paste is being prepared using the pigment dispersion resin which has the group quaternary ammonium. The dispersion resin prepared has good dispersity of pigment and extender. However, the stability of storage and construction of the colour paste is relatively poor, which has a negative influence on the application of cathodic electrodeposited (CED) coatings. However, the detailed investigation on the dispersion resin and the stable colour paste has not been reported.
Design/methodology/approach
Three steps are adopted to prepare the dispersion resin, that is blocking toluene diisocyanate (TDI), quaternary ammoniation of blocked TDI and ring opening of epoxy resin. The resultant dispersion is used to prepare the colour paste. The factors, which have an influence on the dispersity of the dispersion resin and stability of the colour paste, are optimised.
Findings
The typical recipes of preparing the dispersion resin and the resultant colour paste are obtained. The dispersity of the dispersion resin and stability of the colour paste are good based on the typical recipe. In addition, the film of the CED coating is smooth, dense and hard when the colour paste is used in the CED coating.
Practical implications
The dispersion resin can be used to prepare a colour paste, which can be used in the CED coatings. In addition, it also can be applied as a binder of coatings and adhesions.
Originality/value
The factors, which have an influence on the dispersity of the dispersion resin and stability of the colour paste, are studied in detail. The typical recipes of preparing the dispersion resin and the resultant colour paste are obtained. Based on the typical recipe, the dispersity of the dispersion resin and stability of the colour paste are good.
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Xinxin Fu, Yanjun Chen, Minggang Sun and Tengjiang Yu
The service performance for colored asphalt pavement is inevitably affected by the addition of different colorants, especially the challenge of low temperature environment in cold…
Abstract
Purpose
The service performance for colored asphalt pavement is inevitably affected by the addition of different colorants, especially the challenge of low temperature environment in cold regions. Therefore, the purpose of study is to explore the effects of different colorants on the service performance for colored asphalt pavement and to provide a foundation for improving the applicability of colored asphalt pavement in cold regions.
Design/methodology/approach
In the study, three kinds of colorants (iron oxide red, iron oxide yellow, iron oxide green) were used to compare the influence of different colorants amounts and different colorants kinds on the service performance for colored asphalt pavement in cold regions. According to the characteristics of low temperature in cold regions, the effects of different colorants on the low temperature performance for colored asphalt pavement were studied.
Findings
The study shows that different colorants have different effects on the service performance of colored asphalt pavement. The high temperature performance increases with the increase of the colorants amount, but the low temperature performance is opposite. Additionally, the yellow colored asphalt pavement has more advantages of low temperature adaptation than the red and green colored asphalt pavement.
Originality/value
The study results provide a certain theoretical foundation for the application of colored asphalt pavement in cold regions and have certain value and significance for the further development of colored asphalt pavement.
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Ji‐Young Ea Ruckman and Jeong‐Wha Kim
To assess the distortion in colour matching occurring in the process from design of a fabric to printed output, a combined objective and subjective measurement methodology was…
Abstract
To assess the distortion in colour matching occurring in the process from design of a fabric to printed output, a combined objective and subjective measurement methodology was used. The results obtained from the spectrophotometer demonstrated that the hue and chroma of the printed copies differed from the originals. It was found that the perception of colour by fashion/textile designers mainly depends upon overall colour differences (▵E) rather than any individual factors such as lightness, chroma and hue.
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J.H. Xin, K.M. Cheng, T.F. Chong, T. Sato, T. Nakamura, K. Kajiwara and H. Hoshino
Psychological researches of colour reveal that a colour or a group of colours is associated with certain meanings or can cause certain feelings. These feelings of a colour are…
Abstract
Psychological researches of colour reveal that a colour or a group of colours is associated with certain meanings or can cause certain feelings. These feelings of a colour are termed as colour emotions perceived by people. It is important for colour design of a product. Quantitative relationships between colours and the emotion they caused can assist designers to select right colour for the right design objects. The quantitative relationships can also contribute to the reduction of the lead time for colour design process as the colour emotion can be expressed by standard colour specification. A review was carried out in this paper to introduce the research works in quantifying colour emotion.
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The application of colour for an improved presentation of 3‐D structures with finite elements is reported. Also shown is how the hidden‐surface technique can be used for: (1…
Abstract
The application of colour for an improved presentation of 3‐D structures with finite elements is reported. Also shown is how the hidden‐surface technique can be used for: (1) generating pictures in the hidden line alike mode, (2) generating photo‐alike pictures by shading the surfaces according to Lambert's cosine law, (3) showing the regions of different materials or properties by distinct colouring, (4) the presentation of temperature and stress fields by colouring. This colouring is done with smooth colour transitions and delivers pictures similar to those gained by thermography or stress optics. Furthermore, (5) it is possible to generate contour lines on the remaining visible surfaces. The problems arising with the attachment of a colour hardcopier are also considered.
Yan Chen and Zhi‐ge Chen
The research documented in this paper aims to identify the components and characters of color perception and to establish the basis for color perception description and evaluation.
Abstract
Purpose
The research documented in this paper aims to identify the components and characters of color perception and to establish the basis for color perception description and evaluation.
Design/methodology/approach
Ten pairs of antonyms obtained on the basis of investigation were suggested to evaluate the perception of color. About 15 color samples were prepared for subjective evaluation. The factorial analysis method and artificial neural network were applied to analyze the evaluation results given by professionals and to establish the objective basis for color perception evaluation.
Findings
The color perceptions could be distinguished by word pairs. These word pairs were grouped according to the perception characteristics. The relation between color parameters and color perception could be established by artificial neural network technique.
Research limitations/implications
The results showed in this paper were obtained on the limited number of samples.
Originality/value
The principle of color perception was investigated on the subjective evaluation of color samples. The relation between color parameters and color perception was established and could be applied for reference of clothing color design.
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The author's company uses colour measurements in all phases of its iron oxide business, including production, quality assurance, marketing, and research.
Colour is frequently taken for granted, but what do we mean by ‘colour’?
A.K. Arof, N.A. Mat Nor, N.R. Ramli, I.M. Noor, N. Aziz and R.M. Taha
The purpose of the paper is to study the effect of color stability on introducing chenodeoxycholic acid (CDCA) into a colored liquid extract from saffron and determine the color…
Abstract
Purpose
The purpose of the paper is to study the effect of color stability on introducing chenodeoxycholic acid (CDCA) into a colored liquid extract from saffron and determine the color quality of the extract over a nine-month period.
Design/methodology/approach
Six colored liquid samples with different CDCA contents ranging from 0 to 45 Wt.% have been successfully prepared. Chromaticity (C*), color saturation (s), UV-Vis spectroscopy and coloring strength studies have been assessed to determine how CDCA influences the color properties and to study the color quality over time. The color quality was analyzed using the Commission Internationale de l’Eclairage (CIE) system.
Findings
All results obtained revealed that the addition of CDCA significantly influenced the overall color performance of the saffron extraction. However, the most pronounced improvement was recorded with the use of 45 Wt.% CDCA. The sample exhibited the highest color quality at the end of nine months of storage with highest absorbance: C* value = 91.38, color saturation = 0.96 and coloring strength = 687.
Practical implications
This preliminary study offers significant findings for further research focused on stability of natural colorants extracted from Spanish saffron that can provide benefits for future applications especially in coating industry, food, agriculture, medicine and others.
Originality/value
The values of this work can be observed from the information and evidence provided by CIE color stability in terms of chromaticity and saturation, as well as UV-Vis spectrophotometric measurement. It showed that the addition of CDCA additive can help to prolong and enhance the natural colorant properties from Spanish saffron (Crocus sativus L.) for nine month of storage. This proved that by adding additives such as CDCA the saffron colorant can be maintained. To the best of the authors’ concern, this is the first time CDCA is used to prevent color degradation of natural colorant from saffron.
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G. M. Han and X. Q. Deng
Color is the dominant element of visual communication design. For cities, color is one of their characteristics. Improving the overall style of a city through the control and…
Abstract
Color is the dominant element of visual communication design. For cities, color is one of their characteristics. Improving the overall style of a city through the control and planning of architectural color has been a hot issue in urban control and planning in recent years. Considering color pollution in urban planning, we analyze the important role of color in visual communication design from the perspective of the visual communication concept of media art. The current situation of residential building colors in Shanghai City is investigated. We determine the residents’ preferences and requirements related to architectural exterior color on the basis of a data analysis of color and material selection, color matching, composition, and others. This study changes the traditional architectural color design concept that centers on individuals and lacks overall control. Specifically, we construct a set of multi-scale color controlling and planning systems at the macro-, meso-, and micro-scales. We also guide and control the urban architectural color such that it is in accordance with the systematic color planning strategy. This method enables the systematic and holistic external color planning of urban residential buildings.
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