Vol. 17 No. 3
Influence of six surface coatings on quality and storability of dehydrated Dutch rose flowers cv. Taj Mahal
Author(s): M. NARJINARY, ARPITA MANDAL KHAN, S. MAITRA, I. SARKAR AND P. K. PAUL
Abstract: A study to enhance the quality and storability of dehydrated rose flowers by creating a thin, clear, hydrophilic layer on petal surface was conducted at the Department of Floriculture, Medicinal and Aromatic Plants, Uttar Banga Krishi Viswavidyalaya during 2019 and 2020. Dehydrated rose flowers of cv. Taj Mahal were subjected to six surface coating materials, namely -paraffin wax, epoxy resin, silicone resin, natural gum, egg-white and clear varnish, the effect of which were compared to untreated control regarding colour, texture, sensory qualities and shelf-life. Coating with silicone resin as aerosol spray created an unperceivable layer on the flowers which extended the natural look beyond 180 days and simultaneously increased hardness (3750g), firmness (1050g at first peak) and stiffness (187.5g sec-1) of the product compared to control (2040g, 200g at first peak and 102g sec-1, respectively). Paraffin wax coating, though created a thicker coat, received equivalent preference in sensory evaluation. The treatment provided maximum hardness (4000g) thus enhancing durability of the product. Clear varnish and epoxy resin imparted flexibility but caused significant change in colour.
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