20.500.12556/RUL-158862 Primerjava učinkov beljenja bukovine z različnimi sredstvi diplomsko delo - visokošolski strokovni študij Comparison of bleaching effects on beechwood using diferent agents graduation thesis - higher professional studies Les se kot naraven material pojavlja v različnih barvnih odtenkih in z raznimi diskoloracijami, kar mu daje poseben čar. Vendar se v praksi večkrat pojavi potreba po posvetlitvi lesa in barvnem poenotenju. Na bukovem lesu smo preizkusili dvokomponentno belilo na osnovi vodikovega peroksida, lužili za premazovanje in brizganje ter lak, obarvan z lužilom. Z lužilom ter z lakom, obarvanim z lužilom, smo želeli doseči podoben učinek kot s klasičnim peroksidnim belilom. S spektrofotometrom smo izmerili barvne razlike med neobdelanim in beljenim lesom. Z metodo odtrgovanja pečatov pa smo preverili, kako beljenje vpliva na oprijem končnega laka. Dvokomponentno belilo ni dalo pričakovanih rezultatov medtem ko so ostala belilna sredstva les posvetlila na različne načine. Oprijemna trdnost zaključnega laka je bila v vseh primerih zadovoljiva. Sklepna ugotovitev je, da vsak način beljenja da drugačen rezultat, ki je v proizvodnji uporaben za določen namen. Wood as a natural material can be found in a variety of colour shades and discolourations giving the wood a special charm. However, in woodworking practice there is often a desire for lighter colour shades and higher colour uniformity.Three different bleaching agents were tested on beechwood samples: a two-component bleaching agent based on hydrogen peroxide, wood stains for application by brushing and spraying and a coating, coloured with a wood stain. By experiments with the stains and the coloured coating, we tried to achieve a bleaching effect, comparable to the effect of classic peroxide%based bleaching agent. We measured colour differences between untreated and bleached wood samples with a spectrophotometer. A pull-off test was used to evaluate effects of bleaching process on the adhesion strength of a final coating film of a surface sistem. The bleaching results of the two-component bleaching agent did not meet our expectations, however, the remaining agents resulted in different bleaching effects on wood. Adhesion strength of the coating finish was acceptable in all cases. We achieved a variety of bleaching results using different agents which can be used in woodworking production. beljenje lesa bukovina belilo lužila wood bleaching beech wood bleach wood stains true false false S. Majnik Slovenski jezik Angleški jezik Diplomsko delo 2024-06-21 11:47:12 2024-06-21 11:47:14 2024-07-05 03:41:19 0000-00-00 00:00:00 2016 0 Ljubljana 2016 Ljubljana VIII, 44 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630*829.11 2636681 UNI_Majnik_Stanislav_2016.pdf UNI_Majnik_Stanislav_2016.pdf 1 076D8CFBDA09ECCD17B10DE5F03A1585 64d0873b8c9473d3e300278a1c698491101abaa9a03e5ee288af4c9c623bc5e0 3dc97060-2fb3-11ef-a25b-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=186591 Biotehniška fakulteta 0 0 0