摘要
本試驗研究的對象包括臺灣仿港宣、港宣、楮皮宣、皮麻宣及玉扣紙等五種手工紙，經由加熱老化的方法，測定紙張之保存性，加熱老化係於105±2℃之烘箱中行之，根據前人之研究，除了白度之外，這種加熱老化方法可以預測紙張於自然環境下之保存年限。 在試驗中，選擇耐摺力及撕力來評定加熱對紙張之劣化效應，此外，亦於不同加熱時間取樣測定紙張之pH及白度。 試驗結果顯示：皮麻宣及玉扣紙之保存性最佳。前人之報告指出：紙張於105℃加熱老化24天後，耐摺力至少保留50%，撕力留存80％以上，才能符合高保存性紙張之標準。前述之皮麻宣及王扣紙皆能符合上述標準，而臺灣仿港宣、港宣及楮皮宣在紙張強度方面無怯符合高保存性紙張之要求。
並列摘要
The permanence of five kinds of handmade paper was examined. The purpose is to obtain, by an accelerated aging test, information regarding the aging qualities of the paper. The accelerated aging tests were made with an oven that maintained a uniform temperature of 105±2℃. As other studies indicated that except for color changes, the results of heating under the prescribed condition correlate with normal aging process of paper. Folding endurance and tear resistance of the papers are selected to estimate the effects of heat treatment. Further considerations were given to the pH and the brightness of the papers throughout the aging periods. The best results are obtained from paper C and paper E. Other researches suggest that after 24 days of artificial aging at 105℃, at least 50% of the original folding endurance and 80% of tear strength should still remain for a paper to be deemed permanent. Both of them meet these criteria of maximum permanent paper satisfactorily. Paper A, B and D, however, do not meet the specifications of permanent paper with respects to paper strength.