本研究針對一批民國35~37年的酸化紙質檔案，進行簡易可行的乾式脫酸試驗，處理過程係將酸性紙張以三 明治方式夾入2張含有碳酸鈣之鹼性紙中，藉由荷重加壓與調整存放環境之相對濕度，將老化變酸之紙質檔 案與鹼性紙張緊密接觸，使達到中和紙張酸性之目的。試驗探討放置於相對濕度95%，65%及室溫環境下對 檔案脫酸效應之影響。試驗結果顯示：經與鹼性紙張堆疊壓締60天後(於第30天更新鹼性夾紙)，可使酸化紙 質檔案之表面酸鹼值約提升2以上而趨於中性。經過壓締脫酸處理後，對於紙質檔案之白度與色差值影響極 為輕微，證明以乾式堆疊脫酸處理，並未造成酸化紙質檔案外觀顏色的變化。在相同荷重加壓 (5kg)下，經 相對濕度95%，65%及室溫環境分別放置，皆可提升酸化紙質檔案之pH值，隨相對濕度增高，則pH值提升 趨勢益形顯著。本研究證實，此種無須使用化學藥劑進行之乾式壓締脫酸處理是相當簡易可行之脫酸處理 法，且確實有助於減緩紙質檔案之劣化速度。

This study focuses on the use of a commercial alkaline paper to treat acidic archives dating from between 1946 and 1948 by a dry press method. This involves pressing the acidic papers (loaded to 5kg) between sheets of alkaline papers with calcium carbonate reserves in a sandwich structure at various relative humidity (RH) values. The treatment period was 60 days and the alkaline papers were exchanges after 30 days. Comparative results are presented for treatments at various RH values (65%, 95% and ambient room RH). Tests were run concurrently. Changes in humidity and colour for the treated papers were monitored every 5 days, as well as pH values. After treatment, pH in the treated papers rose by up to 2 points to bring them close to neutral. There was no significant change in the reflectivity or colour values after treatment. WE conclude that the dry press method is a simple and effective de-acidification treatment that does not require direct chemical intervention on valuable paper archives.