歌曰∶紫霞膏贴远年疮，铜绿轻竭乳没良，麻仁松香合一处，白蜡清油要相当，久顽疮毒不收口，一帖之后效非常。
（处方） 铜绿（五钱） 血竭（五钱） 乳香（五钱） 没药（五钱） 松香（一两） 蓖麻仁（一百粒） 轻
粉（二钱）
（制法） 先将前五味共研细末，投入石臼中，再加蓖麻仁、轻粉，并滴入清油数滴同捣之，约二三千杵时，
即可成膏，如不成膏，可再加蓖麻仁数十粒再捣，直捣至臼内膏软如棉，十分融和时为止，收贮备用。
（用法） 此膏善除湿热，拔毒生肌，凡夏秋之间感染湿热发疮者，以此贴之，其去腐生肌之功甚捷。他如梅毒、
疮，亦有特效。
近人徐 臧验方精华中之“紫霞膏”，较此方小有差别，惟其制炼方法则甚可取法，故转录之，以作本方参考∶
制松香（六两） 制乳没（各六钱） 血竭（四钱） 铜绿（二钱） 潮脑（六钱） 朱 （三两）
腰黄（八钱） 麝香（八分） 蓖麻仁（三两）
上十一味，除松香、蓖麻仁外，各先后研末备用，各药分量以研末后净秤为准，故在未研之前，当各多备若干，免
致研后不敷。合膏时，以石臼捣松香使烂，次加蓖麻仁，三加铜绿，四加儿茶，五加乳香，六加没药，七加
血竭，八加潮脑，九加朱 ，十加腰黄，末后加入麝香，合好之后，贮于罐内，用纸封固备用。上列各药重量，
系就一料计算，如一次多合则手续较省，但松香既多，舂捣必难，故当事先预约数人任务，以便更番轮换，务使
手不停杵，愈熟愈妙。捣时如药嫌干，可酌加蓖麻仁若干粒以调整之，如年久膏硬时，亦用此法调整。
此膏专治 串，未成者自能消散，已溃而流脓液者，当酌加轻粉、犀黄以辅助之，在摊膏时，须隔水炖融，切忌直
接火烘，或在临用时就热水壶上温融之，不可采用直接火烘，因膏中麝香经火则气泄而效减也。
制松香法∶以松香五斤，用鲜芙蓉花
连叶十斤（以花多者为佳），柳条、桃叶、榴叶各五斤，甘草一斤，煮成浓汤后，去渣滤清，留一小部份，另储使冷，余
盛锅中，安放露天（勿置屋内，妨爆溅也），入松香再煎，约松香一桶，汤三桶，俟油沸尽，即陆续用铜勺捞出，倾入冷
汤中取起，每枚捏成如烧饼式，中穿一孔，以粗麻线贯之，分装布袋，紧束袋口，浸粪缸中四十九日，取出去袋，以长
流水漂冲三日，再露七日夜后，埋土中七日，存储备用，以二、三年者为佳。粪
缸以无病之童男、童女粪为最好，年长健壮妇女次之，惟忌经带，若男子已成人者，则不合用。
Song says: Zixia Gao (Purple Cloud Plaster) is applied to chronic ulcers of many years. Malachite Green (Tonglü), Calomel (Qingfen), Dragon's Blood (Xuejie), Frankincense (Ruxiang), and Myrrh (Moyao) are effective. Castor seeds (Bimaren) and Pine Rosin (Songxiang) are combined together; the proportion of Beeswax (Baila) and Refined Oil (Qingyou) should be appropriate. For stubborn sores and toxins that fail to heal over a long period, one application yields extraordinary results.
(Prescription) Malachite Green (Tonglü, 铜绿) - 5 qian; Dragon's Blood (Xuejie, 血竭) - 5 qian; Frankincense (Ruxiang, 乳香) - 5 qian; Myrrh (Moyao, 没药) - 5 qian; Pine Rosin (Songxiang, 松香) - 1 liang; Castor Seeds (Bimaren, 蓖麻仁) - 100 grains; Calomel (Qingfen, 轻粉) - 2 qian.
(Method of Preparation) First, grind the first five medicinal materials into fine powder together, put them into a stone mortar, then add Castor Seeds (Bimaren) and Calomel (Qingfen), and drip in a few drops of Refined Oil (Qingyou) to pound together. After pounding about two or three thousand times, it can become a plaster. If it does not form a plaster, add dozens more Castor Seeds and continue pounding until the plaster in the mortar becomes soft like cotton and fully integrated. Then store it for future use.
(Method of Application) This plaster is good at eliminating damp-heat, extracting toxins, and promoting flesh regeneration. It is suitable for those who suffer from sores caused by damp-heat infection during summer and autumn; applying this plaster has a very rapid effect on removing necrotic tissue and generating new muscle. It also has special effects on other conditions such as syphilis and sores.
The "Zixia Gao" in Xu Zang's *Essence of Verified Prescriptions* differs slightly from this prescription, but its refining method is highly worthy of reference. Therefore, it is transcribed here for reference:
Processed Pine Rosin (Songxiang, 松香) - 6 liang; Processed Frankincense and Myrrh (Ruxiang, 乳香 & Moyao, 没药) - 6 qian each; Dragon's Blood (Xuejie, 血竭) - 4 qian; Malachite Green (Tonglü, 铜绿) - 2 qian; Borneol (Chaonao, 潮脑) - 6 qian; Cinnabar (Zhusha, 朱砂) - 3 liang; Waist Yellow (Yaohuang, 腰黄) - 8 qian; Musk (Shexiang, 麝香) - 8 fen; Castor Seeds (Bimaren, 蓖麻仁) - 3 liang.
Of the above eleven ingredients, except for Pine Rosin (Songxiang) and Castor Seeds (Bimaren), grind the remaining medicines into powder separately for later use. The dosage of each medicine is based on the net weight after grinding, so prepare extra before grinding to avoid insufficient quantity afterwards. When making the plaster, pound the Pine Rosin (Songxiang) in a stone mortar until soft. Next, add Castor Seeds (Bimaren). Third, add Malachite Green (Tonglü). Fourth, add Child's Bone (Ercha, 儿茶). Fifth, add Frankincense (Ruxiang). Sixth, add Myrrh (Moyao). Seventh, add Dragon's Blood (Xuejie). Eighth, add Borneol (Chaonao). Ninth, add Cinnabar (Zhusha). Tenth, add Waist Yellow (Yaohuang). Finally, add Musk (Shexiang). After mixing well, store in a jar, seal with paper, and keep for use. The weights listed above are calculated per batch. If making a larger batch at once, the process is simpler, but pounding becomes difficult due to the increased amount of Pine Rosin. Therefore, arrange for several people to take turns pounding continuously to ensure proficiency. If the mixture is too dry during pounding, adjust by adding some Castor Seeds. If the old plaster becomes hard, use the same method to adjust.
This plaster is specifically used for treating scrofula (Luoli, 瘰疬). For unruptured cases, it can naturally dissipate; for ruptured cases with pus discharge, Calomel (Qingfen) and Xi Huang Wan (Rhino Horn Powder) should be added appropriately to assist treatment. When spreading the plaster, melt it by heating in a water bath. Avoid direct fire roasting. Alternatively, warm it on a hot water kettle when ready to use. Do not use direct fire, because the Musk (Shexiang) in the plaster will lose its aroma and efficacy if exposed to heat.
Method of Processing Pine Rosin (Songxiang): Take 5 jin of Pine Rosin (Songxiang). Use 10 jin of fresh Hibiscus mutabilis flowers with leaves (flowers are preferred), 5 jin of Willow twigs, 5 jin of Peach leaves, 5 jin of Pomegranate leaves, and 1 jin of Licorice Root (Gancao, 甘草). Boil to make a concentrated decoction, remove dregs, and filter clearly. Reserve a small portion separately and let it cool. Put the rest in a pot and place it outdoors (do not place indoors to prevent splashing). Add Pine Rosin (Songxiang) and boil again. The ratio is approximately one bucket of Pine Rosin to three buckets of decoction. When the oil boils off, scoop out successively with a copper spoon and pour into the cold reserved decoction to solidify. Shape each piece like a sesame cake, pierce a hole in the center, thread with coarse hemp rope, pack into cloth bags, tie tightly, and soak in a manure pit for 49 days. Remove, take out of the bag, rinse with running water for three days, expose to air for seven days and nights, then bury in soil for seven days. Store for use; two to three years aged material is best. The manure pit should preferably contain feces from healthy young boys and girls; feces from older, robust women are secondary. However, feces from menstruating women are taboo. Feces from adult males are unsuitable.