Dr Majid Montazer, Mr Saied Ahankoob,
Volume 1, Issue 1 (3-2006)
Abstract
Ammonia is a weak base that can be used as an swelling agent on wool fibres before dyeing. In this study the pretreatment of wool with ammonia in different percent solutions (5, 10, 15, 20) is carried out, and its effect on dye-ability of wool by natural dyes such as madder, walnut shell, pomegranate peel, vine leaf, white and red onion skin, is analyzed. Also the effects of temperature, length of time, and concentration of ammonia on dye-ability of wool fibres were considered. Colorimetric data, and measurements of light and washing fastness were carried out, and the results of color change under ammonia treatment are reported.
Ms Akhtar-Alsadat Mousavi, Ahmad Akbari, Hassan Khatami,
Volume 14, Issue 34 (3-2019)
Abstract
One of the problems of natural yellow dyes (weld) is their low stability against light and their high fading rate. One of the main destructive factors in pale of color fibers and hand-woven carpet is the high-energy ultraviolet radiation which causes chemical bonds to break and optically damages of organic structures. In this study, the effect of some antioxidants (gallic acid, ascorbic acid) and conventional UV absorbents, (2- hydroxy benzophenone as a supplement agent is studied in order to improve light fastness property. The effect of light fastness variables such as exposure time, antioxidants concentration, relative humidity were optimized. Afterward, the obtained changes were compared with the original sample and were stated in terms of ΔE color change value. The results showed that in all cases, the use of UV absorbents or antioxidants relatively improves light stability properties of the samples. The best result in increasing light stability was observed in using gallic acid.
Sasan Samanian, Sareh Bahmani,
Volume 15, Issue 36 (3-2020)
Abstract
The Iranian Carpet Museum collection contains the most valuable specimens of rugs from the ninth century AH to the contemporary period and is a rich source of research for researchers and art friends. Carpet Museum carpets and carpets, according to their quality and antiquity and taking into account the characteristics of carpet in terms of color, design, role, texture and variety of carpet weaving areas are preserved. The museum is built on two floors, the first floor of which is a permanent display of 150 pieces of carpet and the second floor is intended for specialized and seasonal exhibitions.
In this empirical-analytical study with environmental studies, sampling as well as library and laboratory studies, we have identified and introduced appropriate light levels for the storage of museum carpets with natural fibers, thus In order to perform tensile strength test of museum carpets because it is not possible to perform tests on museum rugs and it is necessary to fabricate rugs in accordance with the statistical population studied, weave samples of natural fibers of wool, cotton and Silk is done. Finally, according to the data obtained from the test of tensile strength of carpet in line with the length and width of the samples, analysis of variance, Toki and LSD tests can be concluded that light has a destructive effect on the carpet and reduces the tensile strength of the carpet and It has a significant effect on the tensile strength of carpets.
