Standardization for drying, bleaching and dyeing processes in dried flowers
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Society for Promotion of Horticulture
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An experiment was conducted at Tamil Nadu Agricultural University, Coimbatore, during 2009-2010 to standardizeprocessing techniques for dried flower production. Foliage of silver oak (Grevillea robusta), thuja (Thuja orientalis)and camellia (Camellia reticulata) was best preserved by glycerinization; leaves were soft and pliable, with lowestmoisture and highest overall acceptability. In the case of fully-opened flowers in button-type chrysanthemum(Chrysanthemum grandiflorum), gerbera (Gerbera jamesonii) and plumeria (Plumeria alba), a combination of sandand silica gel, and microwave-oven embedded method was found to be suitable for drying, with high overall acceptability.Dried pods of jacaranda (Jacaranda mimosifolia) and castanospermum (Castanospermum australe) were fully bleachedby soaking overnight in 10% sodium hydroxide and subsequent treatment with 2% sodium hydroxide + 2.5%sodium silicate + 35% hydrogen peroxide. Bleached pods were given dye treatments where acrylic dyes showed gooddyeing consistency, light fastness, wash fastness and rubbing fastness.
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