同仁堂阿膠傳統制作技藝，一是選用上等、整張驢皮。二是采用傳統古法炮制工藝，包括熬膠技藝、打沫技藝、收膠技藝、悶晾技藝、擦膠技藝。熬膠技藝是指按傳統常壓補水熬膠，保留膠液的技藝；收膠技藝是指憑借藥工豐富經驗，通過觀察“掛旗”等傳統工藝判斷收膠火候的技藝；悶晾技藝是指按傳統“三悶三晾”方式晾膠的技藝；擦膠技藝是指按傳統技藝對阿膠進行反復擦拭的技藝。
The traditional production techniques of Tong Ren Tang Ejiao insists on using premium and full piece of donkey skins as the raw materials, and strictly adopts the ancient preparation processes that include stewing, foaming, collection, drying and wiping. In particular, stewing is the traditional process of stewing the donkey skin with water under regular pressure to preserve the gelatin; collection is the traditional process that relies on the extensive experience of production workers to determine the timing of collection based on the thickness of gelatin; drying is the process of drying the gelatin with the tradition method of “smoldering and hanging for three times”; and wiping is the traditional process of wiping the Ejiao for multiple times.
