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Optimizacija metode določanja odpornosti premazov proti obarvanju zaradi grč v lesu : diplomsko delo = Optimization of the method for the assessment of the knot- staining resistance of wood coatings : B. Sc. thesis
Vrbec, Jure
V diplomski nalogi smo optimizirali standardno metodo SIST EN 927-7:2020, ki določa odpornost premazov proti obarvanju zaradi grč v lesu. Te metode v Laboratoriju za obdelavo površin še nikoli niso ...izvedli, zato smo se odločili, da preverimo, če je omenjeno metodo z razpoložljivo opremo sploh mogoče izvesti oz., da se z ustreznimi prilagoditvami standardiziranemu postopku čim bolje približamo. Poleg tega pa smo želeli preveriti, kako je z vrednotenjem nekaj osnovnih tipov belih pigmentiranih premazov. Za podlago smo uporabili grčave vzorce lesa rdečega bora (Pinus sylvestris L.). Cilj raziskave ni bil toliko v ugotavljanju razlik med različnimi tipi premazov, temveč v ustrezni prilagoditvi, optimizaciji in kritični presoji o izboljšanju standarda. Z izvedbo metode smo ugotovili, da z vrednotenjem barve pred izpostavitvijo in po njej in z upoštevanjem te barvne razlike veliko bolj upravičeno oz. objektivno razvrstimo premazne sisteme po učinkovitosti proti obarvanju zaradi grč v lesu. Ugotovili smo, da ni veliko premaznih sredstev, ki bi rumenenje grč v celoti preprečili, vendar pa so pri tem prekrivni premazni sistemi bolj učinkoviti kot poltransparentni. Prav tako smo ugotovili, da premazni sistemi na osnovi topil bolje preprečujejo pojav rumenenja grč kot sistemi na vodni osnovi.
Type of material - undergraduate thesis
; adult, serious
Publication and manufacture - Ljubljana : [J. Vrbec], 2021
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