Influence of Natural Dyes on Surface Roughness of Eastern Redcedar

Bu çalışmanın amacı; kökboya'dan elde edilen boya ve iki tip mordan karışımları (demir sülfat (Fe2(SO4)3.7H2O) ve alüminyum sülfat KAl2(SO4)3.18H2O)) ile boyanan kırmızı doğu sediri (Juniperus virginana L.) türünün yüzey kalitesinin değerlendirilmesidir. Elde edilen boyar madde ve mordan karışımları deney örneklerine klasik daldırma ve ultrasonik yöntem kullanılarak uygulanmıştır. Boyanan ve kontrol grubu örneklerinin, ince kalem tipi profilometre kullanılarak, ortalama pürüzlülük (Ra) ve ortalama pürüzlülük derinliği (Rz) değerleri ölçülmüştür. Boyasız kontrol ve boya uygulanmış numunelerin yüzeylerinden alınan Ra ortalama değerleri sırasıyla 2.60 ?m ve 3.25 ?m olarak kaydedilmiştir. Kökboya ve alüminyum sülfat ile demir sülfat karışımı kullanılarak renklendirilen örneklerin yüzey kalitesinin olumsuz olarak etkilenmediği gözlemlenmiştir. Sonuç olarak; daha uzun ömürlü, toksik olmayan ve çevre dostu bir ürün olarak kökboyanın kırmızı doğu sedirimden üretilen ürünlerin boyanmasında potansiyel bir malzeme olabileceği düşünülmektedir

Doğal Boyaların Kırmızı Doğu Sediri Yüzey Pürüzlülüğüne Etkisi

The objective of this study was to evaluate surface quality of Eastern redcedar (Juniperus virginana L.) samples finished with natural dye produced from the Madder root (Rubia tinctorium L.] with two kinds of mordants, ferrous sulfate (Fe2(SO4).7H2O) with technical grade 96% purity, supplied by Merck and alum KAl2(SO4)3.18H2O (puriss. p.a. Fulka). Surface roughness of the control and finished samples were measured employing a fine stylus type profilometer resulted in two parameters, namely average roughness (Ra) and mean peak-to-valley height (Rz). Finishing materials were applied to the surface of the samples by soaking with and without using ultrasound in a tank. Average value of Ra taken from the surface of unfinished control samples and finished samples were 2.60 ?m and 3.25 ?m, respectively. It appears that natural dye with alum and ferrous sulfate used as dying materials did not adversely influence overall surface quality of the samples. Based on the initial findings in this work such root dye would have potential as ecofriendly non-toxic colorant to extend the service life of product manufactured from Eastern redcedar

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