螢光染料因穩定性不佳而具有「可遷移性」，有著影響人體健康的可能，從2008年開始就受到各界關注。財團法人中華民國消費者基金會和經濟部標準檢驗局都曾經對市售螢光染料產品進行抽檢；其結果在媒體的報導下，曾令全民對螢光染料相關產品產生不安。
本研究主要目的在以「離子交換樹脂」技術，開發「鋰鹽置換」液體螢光染料，並期望此製程經過不斷研究和改良後，得以增加螢光染料的穩定性，藉此降低固體染料對人體的可遷移性。
除了ICP測定離子置換率設置檢量線外，對於置換後的螢光染料亦以1.目測比較其外觀、濁度、有無結晶析出及懸浮物。2. 與原液濃度、pH值、比重、黏度比較。3.擺放在低溫24小時後之安定性(擺放在4℃、0℃、-10℃、-20℃後,回復室溫之影響)。4.增白力測試等物性。
使能證明經過置換改質後，較穩定的鋰鹽染料之物性和染色能力不會和傳統鈉鹽染料有差別。

Because of the low stability of fluorescent dye,the fluorescent dye have“migratability”. It may affect health of human being. Therefore, the migratability of fluorescent dye has been buzz between society and the press since 2008.
This project is aimed at the innovative development of cation exchange resin-Using Lithium ion to replace the Sodium ion in the fluorescent dye which were made by the Sodium salt out process , to decrease the migratability to human being of the solid fluorescent dye.
In addition to ICP and checking quantity line testing, we also have four ways to testing the stability of liquid fluorescent dye after cation exchanging. There are (1) To observe is there any color changing or crystal comes out by visual determination. (2) To compare concentration, pH , density and viscosity between the liquid dye before and after cation exchanging.(3)Low –temperature stability testing after cation exchanging, it could not separate any crystallite after 24 hours in low-temperature such as 4℃,0℃,-10℃ and-20℃ .(4)mechanical whiteness and fluorescence testing.
After these flew testing, we can prove that there are no properties’ difference between Lithium ionic fluorescent dye and Sodium ionic fluorescent dye.

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