TY - BOOK AU - Hong, Sung Hee. TI - Feasibility of carrot extract as invisible ink AV - PGS TP 910.C37 .H772 2006 PY - 2006/// CY - Las Piñas City, Philippines : PB - Southville International School and Colleges KW - Invisible inks KW - Chemical properties. KW - Natural dyes and pigments KW - Carrot extract KW - Chemical composition KW - Secret writing KW - Organic compounds. KW - Feasibility studies KW - Natural ink sources N1 - Includes bibliographical references. ER -