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首页> 外文期刊>JCT research >Varnish Layer Hardness of Oriental Beech(Fagus orientalist L)Wood as Affected by Impregnation and Bleaching
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Varnish Layer Hardness of Oriental Beech(Fagus orientalist L)Wood as Affected by Impregnation and Bleaching

机译:Varnish Layer Hardness of Oriental Beech(Fagus orientalist L)Wood as Affected by Impregnation and Bleaching

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摘要

The impacts of impregnation and bleaching on the varnish layer hardness of Oriental beech(Fagus orientalist L.)wood were investigated.A number of bleaching combinations{NaOH-H_2O,NaOH-Ca(OH)_2-H_2O_2,NaOH-MgSO_4-H_2O_2,NaHSO_3-H_2C_2O_4,NaSiO_3-H_2O_2,KMnO_4+NaHSO_3+H_2O_2}were applied at 18 concentration for bleaching to both impregnated and unimpregnated specimens of Oriental beech wood.Subsequently,water-based(WB)varnish was coated over the samples and the varnish layer hardness values were determined in accordance with ASTM D 4366-95.All of the chemicals used for bleaching reduced the surface hardness.However,after varnish coating,the hardness of most samples was similar to that of the varnish-coated natural(control)samples.

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