ESTIMATION OF COLOUR DIFFERENCES IN THE CASE OF WOOL DYEING WITH NATURAL DYES EXTRACTED FROM GREEN NUTSHELL
Journal Title: Annals of the University of Oradea. Fascicle of Textiles, Leatherwork - Year 2016, Vol 0, Issue 2
Abstract
In this paper were experimentally determined the colour differences between two pattern (standard and sample) with CIELAB formula in case of dying with natural dyes extracted from green nutshell. The dyes were made according to an experimental program at different concentration. The obtained dyes were used to estimate the colour differences that are usually a mixture of differences of brightness, saturation and nuance. In order to determine the intensity of the dyeing was measured at spectrophotometer Specord 200 the remission of the dyed samples. With their help were calculated the trichromatic values X, Y, Z and then the rectangular coordinates: L*- lightness coordinate, a* - the chromaticity coordinate for red-green colour area, b* - the chromaticity coordinate for yellow-blue colour area in CIELAB space. From these values derive the cylindrical coordinates: L*- lightness, C* -chroma, H* - nuance. The differences in colour ΔE between the samples and the standard sample are represented by distances between respective positions in CIELAB field and were calculated with some standardized relations. This colour differences were decomposed in: ΔL* - the difference in lightness ΔC* - the difference in chroma, ΔH* - the difference in nuance and calculated in CIELAB units. Were also made the diagrams: the position of the colours in CIELAB field, the chromatic diagram a*=f(b*), the lightness position and the colour differences between the samples and the standard sample.
Authors and Affiliations
Monica PUSTIANU, Adina BUCEVSCHI, Alexandru POPA, Erzsebet AIRINEI
Keywords
Related Articles
- EP ID EP429714
- DOI -
- Views 66
- Downloads 0
EXAMINING COMFORT PROPERTIES OF LEATHER and ARTIFICIAL LEATHER COVER MATERIALS
The analysis and regulation of workplace, working instruments, the comfort of office chair, business environment (sound, lighting, climate, vibration, temperature, and humidity), work and break times, analysis and editin...
THE EVOLUTION OF THE INTERNATIONAL TRADE AND ITS IMPACT ON THE ROMANIAN EXPORTS
This paper analyzes the impact of the financial and economic crisis on the evolution of international trade and implicitly on Romanian exports during 2000-2014. Methods of the research that have been employed in the pape...
THE ROLE OF THE UNIVERSITY IN FOSTERING ENTREPRENEURIAL INTENTION AMONG STUDENTS
Entrepreneurial intention among university students may be conditioned by following training activities related to entrepreneurship during the course of their degree studies. There has clearly been an increase in the num...
CUSTOMIZED WORK EQUIPMENT THROUGH INNOVATIVE TECHNOLOGY FOR DESIGN AND VIRTUAL SIMULATION
Textile, clothing and technical products sector has an important impact on economic growth, sustainable development and employment. The paper presents the implementation of the innovative informational technology for des...
APPLICATIONS OF SPACERS MADE WITH DOUBLE BAR RASCHEL MACHINE
Nowadays, textile technologies develop to adapt their different techniques for creating new products for the different sectors of application every day. Particularly, warp knitted fabrics and warp-knitting technology hav...