Results indicated that in the natural varnishing effects of wood species on the layer hardness of varnish are unimportant but the effects of varnish types are important. In the varnishing, after bleaching the wood types, bleaching chemicals and their concentration and varnish kinds effected the layer hardness of varnish. | Tr. J. of Agriculture and Forestry 23 (1999) 443-450 © TÜBİTAK The Effects of Chemicals for Using the Bleaching of the Wood Surfaces on the Layer Hardness of Varnish Burhanettin UYSAL Yüzüncü Yıl Üniv. Van Professional College, Furniture and Decoration Department. 65080, Van-TURKEY Musa ATAR, Ayhan ÖZÇİFÇİ Gazi Üniv. Faculty of Technical Education, Furniture and Decoration Department, Ankara-TURKEY Received: Abstract: The objective of this research was to determine the effects of sodium hydroxide + hydrogen peroxide, sodium hydroxide + calcium hydroxide + hydrogen peroxide, hypochlorite and hydrochloric acid applied on the scotch pine (Pinus sylvestris L), oriental beech (Fagus orientalis Lipsky), ash wood (Froxinus excelsior L.) and oak (Quercus petraea Mattu Liebl.) on the layer hardness of acrylic, synthetic, polyurethane and acid catalyzed varnish. Results indicated that in the natural varnishing effects of wood species on the layer hardness of varnish are unimportant but the effects of varnish types are important. In the varnishing, after bleaching the wood types, bleaching chemicals and their concentration and varnish kinds effected the layer hardness of varnish. Key Words: Bleaching on the wood, bleaching methods, sodium hydroxide, hydrogen peroxide, calcium peroxide, hypochlorite and hydrochloric acid and varnish. Ağaç Yüzeylerinde Renk Açmada Kullanılan Kimyasalların Vernik Katman Sertliğine Etkileri Özet: Bu araştırmada, sarıçam (Pinus sylvestris L), Doğu kayını (Fagus orientalis Lipsky), dişbudak (Fraxinus excelsior L.) ve sapsız meşe (Quercus petraea Mattu Liebl.) üzerinde, sodyum hidroksit + hidrojen peroksit, sodyum hidroksit + kalsiyum hidroksit + hidrojen peroksit, hipoklorit ve hidroklorik asitle renk açma işlemi yapılmıştır. Daha sonra ağaç örneklerin yüzeylerinde akrilik, sentetik, poliüretan ve asit katalizörlü vernikler uygulanarak renk açma kimyasallarının vernik katmanlarının sertliğine etkileri araştırılmıştır. Deneyler .
