Experiment of Ark Shell (Arca) for Natural Mordant Phongsri Rodphothong1Phongsri Rodphothong, Uraiwan Paradee (Pitimaneeyakul)
Abstract
The objectives of this research were to develop natural mordant, Calcium Carbonate, from seashell (Blood Cockle, Arkshell or Arca) as raw material. After consuming the flesh, ark shell is waste. This natural mordant was developed for natural dyeing process. The study emphasized on effectiveness of Calcium Carbonate from ark shell for natural dyes. This research also involved the wash fastness and light fastness test. This research extracted the natural dye from theleaves of Malabar almond leaves (genus Terminalia), indigenous plant in Thailand, and the natural mordant from Arkshell. The mordant concentration was tested at 3 %, 5 %, 10 % to determine the effectiveness of wash-fastness andlightfastness, which use L*, a*, b*, C*, H*, dL*,da*, db*, dC*, dH*, and dE* as indicators. The results from this research presented that the natural mordant from ark shell responded well to the hue value but the different level of concentration did not result to color shades. The natural mordant did not show the differences in the wash-fastness but responded well to the light-fastness.
Keywords: Natural dyes, Natural mordant, environmental-friendly dyeing.
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