The staining influence of iron (II) sulphate on Norway spruce wood

Abstract

The staining influence of iron (II) sulphate on Norway spruce wood The paper presents the results ofresearch on the colour change of Norway spruce (Picea abies L.) wood under the influence of iron (II) sulphatewater solution at three different concentrations (1%, 2%, 3%). The tests were perfomed wood showing defectstypical of coniferous wood. The aim was to determine the possibility of increasing the usefulness of wood withdefects (blue stain, reactive wood). Measurements of color parameters and their changes based on the CIELabcolor space were carried out. The influence of natural weathering on further staining effect was also determined.On the basis of the tests carried out, it was shown that iron (II) sulphate causes greying of Norway spruce (Piceaabies L.) wood and that the concentration of the solution does not have a major effect on color changes. The surfaceof the aged wood was clearly stained and darkened, with the greatest difference in the samples modified with a3% solution.