Reconstruction of Reflectance Curves from CIEXYZ Values Using Interpolation Method in Three Dimensional Space
F.
M. Abed
Department of Color Physics, Institute for Color Science and Technology
author
S.H.
Amirshahi
Textile Engineering Department, Amirkabir University of Technology
author
A.
La´el
Faculty of Sciences, Semnan University
author
text
article
2008
per
In this paper, the linear interpolation technique is applied to reconstruct the reflectance curves of the Munsell color chips from their tristimulus color coordinates. Interpolation method has been applied by using a look-up table (LUT) for transforming color values from the color space to the second multi-dimensional spectrophotometric domain. Tristimulus values of Munsell color chips have been used for creating the look-up table. Results of recovery are evaluated by the metamerism index under two different standard light sources and the root mean square (RMS) error. The results showed that the metamerism indices between the actual and the reconstructed curves were totally small. The negligible values of the RMS error also indicate the suitability of the proposed method.
Journal of Color Science and Technology
Institute for Color Science and Technology with scientific cooperation of Iran Color Society
1735-8779
2
v.
1
no.
2008
1
7
https://jcst.icrc.ac.ir/article_75909_8c5fef97dd4c25a81b7e8067b9581ee4.pdf
Study of the Silicone Rubber Coatings (RTV) Role on Improvement of the Ceramic Insulators Behavior in Contaminated Areas
H.
Jazayeri
Chemical Engineering Department, Iran University of Science and Technology
author
M.
Ehsani
Department of Polymer Processing, Iran Polymer and Petrochemical Institute
author
F.
Farhang
Chemical Engineering Department, Iran University of Science and Technology
author
text
article
2008
per
In this work, the RTV coatings with different levels of ATH and silica fillers were applied to porcelain suspension insulators for a comparative study of the performance of coated and uncoated porcelain insulators. These coated insulators were exposed to different electrical tests. The test results have been reported based on the role of ATH and silica fillers. The measurement of contact angle is also used to investigate the hydrophobicity properties of coatings. TGA is used to investigate the effect of ATH addition to the samples. It has been found that if only ATH is used as filler, the best performance belongs to the sample with 70 pph ATH. Addition of 10 pph silica also improves the performance of coatings with ATH level between 35 to 70 pph. But it should be mentioned that addition of 10 pph silica to samples with higher ATH level (more than 70 pph ATH) wasn’t beneficial.
Journal of Color Science and Technology
Institute for Color Science and Technology with scientific cooperation of Iran Color Society
1735-8779
2
v.
1
no.
2008
9
22
https://jcst.icrc.ac.ir/article_75910_a4ba58795c3b8d29f8ae455abf822199.pdf
Preparation of Nanocristobalite and Its Effect on Some Properties of Two Component Automobile Clear Coats
M.
Niknam
Materials College, Sciences And Researches Branch, Azad University
author
S.
Baghshahi
Department of Technical and Engineering, Imam Khomeini International University
author
Z.
Ranjbar
Department of Surface Coatings and Corrosion. Institute for Color Science and Technology
author
M.A.
Faghihi Sani
Department of Materials Engineering, Science and Researches Branch, Islamic Azad University
author
text
article
2008
per
In this paper, nanocristobalite was prepared by simple heat treatment of amorphous silica at 1470˚C for 2 hours. The XRD results confirmed that amorphous silica changed to cristobalite completely. The prepared cristobalite and crystaline microsilica (quartz) and two types amorphous of nanosilica (untreated and surface treated) were used to improve the mechanical properties of a two component polyurethane automotive clear coat. The effect of the nanosilicas and microsilica on the optical and mechanical properties of the clear coat was studied. It was revealed that all of the silicas added improved the hardness properties of the coatings, but some of them had a negative effect on the optical properties.Nanosilica (surface treated) improved optical propertiy and wear resistant.
Journal of Color Science and Technology
Institute for Color Science and Technology with scientific cooperation of Iran Color Society
1735-8779
2
v.
1
no.
2008
23
29
https://jcst.icrc.ac.ir/article_75911_38e6cc55320b811ed07bb6d85089329b.pdf
Decolorization of Colored Wastewater Containing Azo Acid Dye Using Photo-Fenton Process: Operational Parameters and a Comparative Study
N.M.
Mahmoodi
Department of Environmental Research, Institute for Color Science and Technology
author
کاوه حسن
رعیت طاری
Department of Environmental Research, Institute for Color Science and Technology
author
Sh.
Borhany
Department of Chemical Engineering , Amirkabir University of Technology
author
M.
Arami
Textile Engineering Department, Amirkabir University of Technology
author
F.
Nourmohammadian
Department of Organic Colorants, Institute for Color Science and Technology
author
text
article
2008
per
In this paper, the decolorization of colored textile wastewater was investigated using Photo-Fenton process. Acid Blue 92 (AB92) was used as an azo acid dye model. The effect of decolorization parameters such as ferrous ion concentration, dye concentration and sodium salts (acetate, nitrate, carbonate and bicarbonate) were investigated. The maximum iron (II) concentration was set to maximum allowable discharge level to environment. The rate of decolorization reaction decreased by increasing dye concentration and in the presence of sodium salts. For a comparative study, decolorization of AB92 was also performed by photocatalysis using immobilized titania and combined Photo-Fenton - photocatalysis processes. The Photo-Fenton process had the greatest decolorization rate in comparison to photocatalysis and combined Photo-Fenton - photocatalysis processes. The results showed that the Photo-Fenton process had the decolorization capability of colored wastewater at different dye concentrations and in the presence of sodium salts.
Journal of Color Science and Technology
Institute for Color Science and Technology with scientific cooperation of Iran Color Society
1735-8779
2
v.
1
no.
2008
31
40
https://jcst.icrc.ac.ir/article_75912_20919a97249cdbebf13574d177bf6a25.pdf
The Effect of Substrate Temperature on Growth of Nanosilver Layer Deposited on White Glass by Magnetron Sputtering
N.
Rahmani Nasab
School of Materials, Islamic Azad University, Science and Research Branch
author
S.
Baghshahi
Department of Technical and Engineering, Imam Khomeini International University
author
M.
A. Shahbazi
Isfahan Optics Industries
author
M.
Tamizifar
School of Materials and Metallurgy, Iran University of Science and Technology
author
text
article
2008
per
In this paper, nanosilver layers for solar mirrors were deposited on white glass substrates (~4 mm thick) by DC magnetron sputtering method. The effect of the substrate temperature about (300-500 K) on the nano Ag film growth was studied. Their properties were characterized by XRD and SEM. The Ag layer followed the Torenton structural zone model at different substrate tempratures. The results showed the silver sputterd particle grow with increased the temperature but dislocation density decreased with it.
Journal of Color Science and Technology
Institute for Color Science and Technology with scientific cooperation of Iran Color Society
1735-8779
2
v.
1
no.
2008
41
47
https://jcst.icrc.ac.ir/article_75913_8f256d0ff89d8aaf29efa19d1047bde6.pdf
The Synthesis of Brown Pigment Based on Fe, Zn and Cr Spinel
B.
Bashirzade
School of Materials, Islamic Azad University, Science and Research Branch
author
H.
Jazayeri
Chemical Engineering Department, Iran University of Science and Technology
author
M.A.
Faghihi Sani
Department of Materials Engineering, Science and Researches Branch, Islamic Azad University
author
Z.
Nemati
Department of Materials Science and Engineering of, Sharif University
author
text
article
2008
per
In this research,a brown spinel based pigment has been synthesized. At first a reference brown pigment has been analysed by XRF, XRD and SEM. Then according to these results, various formulations have been prepared and calcined at defferent conditions. The obtained pigments have been analysed by CIE-Lab, XRF, XRD, SEM and LPSA. The prepared pigments as well as the reference pigment, have been added to the glaze. Then, after glost firring, their colors have been measured in CIE-Lab system. The results showed that color quality of the optimized pigment (i.e. ZnO/Cr2O3=1.6, Fe2O3/ Cr2O3=0.87 and Cal at 1250˚C) prepared it in this work was comparable with the reference one.The prepared pigment showed good thermal and chemical stability.
Journal of Color Science and Technology
Institute for Color Science and Technology with scientific cooperation of Iran Color Society
1735-8779
2
v.
1
no.
2008
49
56
https://jcst.icrc.ac.ir/article_75914_305370b93915b4fe8e5a3b33f96b1f07.pdf
Synthesis and Characterization of Nanosilica Prepared by Precipitation Method
H.
Kolahduzan
Department of Textile Engineering, Yazd University
author
S.S.
Nuri Khorasani
Chemical Engineering, Isfahan University of Technology
author
S.M.
Bidoki
Textile Engineering Department, Yazd University
author
S.
Vaezifar
Chemical Co. FADAK
author
text
article
2008
per
In this work silica nanoparticles were synthesized in a semi-continuous precipitation method. The effects of reaction time, concentration of reactants and pH were investigated on oil absorption and specific surface area (SSA) of synthesized nanoparticles in a full factorial design of experiment (DOE) with three parameters. In this design, each parameter was investigated in two levels. The reaction time and pH were main parameters that affecting on particles oil absorption. BET results showed that all of the three parameters could significantly affect the specific surface area of the product. Morphology and particle size distribution of precipitated nanosilica were investigated using transmission electron microscopy. The particle size of the synthesized silica nanoparticles was observed to be smaller than 20 nm. The average specific surface was found to be of 230 m2/g and average oil absorption 235 g/100 g. The thermogravimetric analysis result showed that the total silanol density in the nanosilica was 15 nm-2.
Journal of Color Science and Technology
Institute for Color Science and Technology with scientific cooperation of Iran Color Society
1735-8779
2
v.
1
no.
2008
57
66
https://jcst.icrc.ac.ir/article_75915_b0dc1ae6028a28ae75cf408664892e9e.pdf