Drying techniques suitable for various plant materials
2001
Azucena, C.F. | Serrano, E.P. | de Castro, J.C. (Philippines Univ. Los Banos, College, Laguna (Philippines). Postharvest Horticulture Training and Research Center)
Different drying methods were evaluated using 15 common tropical cutflowers and foliage to produce quality dried products. Results showed that glycerin preservation is best for foliage of mature and sturdy plants. The only flower that has been preserved successfully in glycerin, with air drying and in silica gel was tropical iris, without losing the color and form integrity and visual quality rating of 7-8 (very good). Most silica gel-dried flowers retained their color and form after drying while air dried and pressed flowers did not have the same color intensity as that of fresh ones. The average drying time for those air-dried was 3 weeks, silica gel drying 4 days, and glycerin preservation lasted for an average of 7 days. Pressing took longer to dry flowers with an average of 4 weeks. Factors affecting drying time include moisture content of the flowers, density of flower head, climate and stage of development
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