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Items for "bleaching"

Changes in color and structure of birch wood (Betula pendula) caused by bleaching with hydrogen peroxide solution

The effect of bleaching with a hydrogen peroxide (H₂O₂) solution on coloring of secondary xylem of kiln-dried birch wood (B...

Keywords: Betula pendula, birch, bleaching, Brinell hardness, contact angle, Electron microscopy, Hydrogen Peroxide

01/2005 | Holzforschung, Walter de Gruyter

Chemical changes in silver birch (Betula pendula Roth) wood caused by hydrogen peroxide bleaching and monitored by color measurement (CIELab) and UV-Vis, FTIR and UVRR spectroscopy

Silver birch (Betula pendula Roth) wood was subjected to bleaching with acidic hydrogen peroxide solution...

Keywords: Betula pendula Roth, birch, bleaching, CIELab, Fourier-transform infrared, Hydrogen Peroxide, Spectroscopy, UV resonance Raman, UV-visible

07/2005 | Holzforschung, Walter de Gruyter

Application of UV-Vis and resonance Raman spectroscopy to study bleaching and photoyellowing of thermomechanical pulps

The chemistry of thermomechanical pulp bleaching and brightness reversion was studied...

Keywords: bleaching, coniferyl aldehyde, fluorescence rejection, Kerr gate, photoyellowing, quinone, resonance Raman spectroscopy, thermomechanical pulp, TMP, UV-Vis reflectance spectroscopy

05/2006 | Holzforschung, Walter de Gruyter

Fluorescence spectroscopy for chromophore studies on bleached kraft pulps

Fluorescence techniques are highly sensitive and, since aromatic lignin is the most likely source of natural pulp fluorescence, they are suitable for detailed investigation of residual lignin in bleached pulps...

Keywords: bleaching, brightness, brightness reversion, carbonyl, chemical analysis, chromophore, Fluorescence, kraft pulp, residual lignin