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INFLUENCE OF THERMAL MODIFICATION ON COLOUR OF POPLAR (POPULUS X EUR AMERICANA) ROTARY CUT VENEER

Mladen Furtula, Abstr Act

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Abstract

This paper presents the results of poplar (Populus x euramericana) veneer colour change caused by one-hour long thermal treatments at temperatures of 190, 200, 210 and 215°C. There were three veneer zones included in this experiment: Veneer from sapwood, veneer from heartwood and veneer from intermediate zone mixed. The measurement results by CIELAB colour system confirmed that there were significant colour differences among the three groups of veneer before thermal treatments. Of all thermal treatments, only the treatment at 210°C contributed to a significant decrease in difference of colour among of all observed veneers. Based on more intensive color change in veneer formats from sapwood, it could be assumed that there were differences in chemical composition between the peripheral and core zones of poplar wood.

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What this paper is about

This paper presents the results of poplar (Populus x euramericana) veneer colour change caused by one-hour long thermal treatments at temperatures of 190, 200, 210 and 215°C. There were three veneer zones included in this experiment: Veneer from sapwood, veneer from heartwood and veneer from intermediate zone mixed. The measurement results by CIELAB colour system confirmed that there were significant colour differences among the three groups of veneer before thermal treatments. Of all thermal treatments, only the treatment at 210°C contributed to a significant decrease in difference of colour among of all observed veneers. Based on more intensive color change in veneer formats from sapwood, it could be assumed that there were differences in chemical composition between the peripheral and core zones of poplar wood.

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Available abstract

This paper presents the results of poplar (Populus x euramericana) veneer colour change caused by one-hour long thermal treatments at temperatures of 190, 200, 210 and 215°C. There were three veneer zones included in this experiment: Veneer from sapwood, veneer from heartwood and veneer from intermediate zone mixed. The measurement results by CIELAB colour system confirmed that there were significant colour differences among the three groups of veneer before thermal treatments. Of all thermal treatments, only the treatment at 210°C contributed to a significant decrease in difference of colour among of all observed veneers. Based on more intensive color change in veneer formats from sapwood, it could be assumed that there were differences in chemical composition between the peripheral and core zones of poplar wood.

Key concepts: Veneer, Significant difference, Materials science, Composite material, Horticulture, Mathematics, Biology, Statistics

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INFLUENCE OF THERMAL MODIFICATION ON COLOUR OF POPLAR (POPULUS X EUR AMERICANA) ROTARY CUT VENEER — Research Paper | ScholarLens