（《拾遗》）
藏器曰∶此是作针家磨 细末也。须真钢砂乃堪用，人多以柔铁砂杂和之，飞为粉，人
莫能辨也。亦堪染皂。
【主治】功同铁粉。和没食子染须，至黑（藏器）。
消积聚肿满黄胆，平肝气，散瘿（时珍）。
【附方】新十。
风湿脚痛∶针砂、川乌头为末，和匀炒热，绵包熨之。（《摘玄方》）
风痹暖手∶针砂四两， 砂三钱，黑脚白矾六钱，研末，以热醋或水拌湿，油纸裹置袋
内，任意执之，冷再拌。（《圣济录》）
脾劳黄病∶针砂四两（醋炒七次），干漆（烧存性）二钱，香附三钱，平胃散五钱，为
末，蒸饼丸梧子大。任汤使下。（《摘玄方》）
湿热黄疮，助脾去湿。针砂丸∶用针砂不拘多少，擂尽锈，淘洗白色，以米醋于铁铫内
浸过一指，炒干，再炒三、五次，候通红取出。用陈粳米半升，水浸一夜，捣粉作块，煮半
熟，杵烂，入针砂二两半，百草霜（炒）一两半，捣千下，丸梧子大。每服五十丸，用五加
皮、
牛膝根、木瓜浸酒下。初服若泄泻，其病源去也。（《乾坤生意》）
水肿尿少∶针砂（醋煮炒干）、猪苓、生地龙各三钱。为末，葱涎研和，敷脐中约一寸
浓，缚之，待小便多为度，日二易之。入甘遂更妙。（《德生堂方》）
泄泻无度，诸药不效∶方同上，不用甘遂。（《医学正传》）
虚寒下痢，肠滑不禁∶针砂七钱半，官桂一钱，枯矾一钱。为末，以凉水调摊脐上下，
缚之。当觉大热，以水润之。可用三、四次，名玉胞肚。（《仁存方》）
项下气瘿∶针砂入水缸中浸之，饮食皆用此水，十日一换砂，半年自消散。（杨仁斋《直
指方》）
染白须发∶针砂（醋炒七次）一两，诃子、白芨各四钱，百药煎六钱，绿矾二钱，为末，
用热醋调刷须发，菜叶包住，次早酸浆洗去。此不坏须，亦不作红。又方∶针砂、荞面各一
两。百药煎为末，茶调，夜涂旦洗。再以诃子五钱，没石子（醋炒）一个，百药煎少许，水
和涂一夜，温浆洗去，黑而且光。
（出自《本草拾遗》）
陈藏器说：这是制针工匠磨制的极细钢砂粉末。必须是真正的钢砂才能使用，人们常将软铁砂掺杂其中，飞制成粉，使人无法辨别。这种粉末也可以用来染黑丝织品。
【主治功效】
作用与铁粉相同。与没食子配合可染须发，颜色乌黑（陈藏器）。
消除体内积聚、肿胀满闷及黄疸，平抑肝气，消散瘿瘤（李时珍）。
【附方】新收录十首。
风湿脚痛：将针砂、川乌头研成粉末，混合均匀后炒热，用棉布包裹熨烫患处。（出自《摘玄方》）
风痹导致的手部寒冷：取针砂四两，硫黄三钱，黑脚白矾六钱，研磨成末。用热醋或水拌湿，用油纸包裹放入袋中，随时手握取暖，变冷后再加水拌湿。（出自《圣济录》）
脾劳引起的黄病：取针砂四两（用醋炒七次），干漆二钱（烧至存性），香附三钱，平胃散五钱，研成细末，用蒸饼糊制成梧桐子大小的药丸。任服汤药送下。（出自《摘玄方》）
湿热导致的黄疮，具有健脾祛湿功效的针砂丸：取适量针砂，打磨去尽锈迹，淘洗至白色。用米醋在铁锅中浸泡过一指深，炒干，再炒三到五次，候其通红时取出。另取陈年粳米半升，用水浸泡一夜，捣碎成粉做成块状，煮至半熟，捣烂，加入针砂二两半，百草霜一两半（炒制），捣一千下，制成梧桐子大小的药丸。每次服用五十丸，用五加皮、牛膝根、木瓜浸泡的酒送服。初服若出现泄泻，说明病邪根源已去除。（出自《乾坤生意》）
水肿尿少：取针砂（醋煮炒干）、猪苓、地龙各三钱。研成粉末，用葱汁研磨调和，敷于脐中，厚度约一寸，绑紧固定，待小便增多为止，每日更换两次。加入甘遂效果更佳。（出自《德生堂方》）
泄泻无度，各种药物无效：方剂同上，但不使用甘遂。（出自《医学正传》）
虚寒性下痢，肠道滑脱不禁：取针砂七钱半，官桂一钱，枯矾一钱。研成粉末，用凉水调匀摊敷在脐上及周围，绑紧固定。应当感觉到大热，若过热可用水润湿。可使用三到四次，此法名为“玉胞肚”。（出自《仁存方》）
颈部气瘿：将针砂放入水缸中浸泡，饮食皆用此水，每十天更换一次针砂，半年后自然消散。（杨仁斋《直指方》）
染黑白须发：取针砂一两（醋炒七次），诃子、白芨各四钱，百药煎六钱，绿矾二钱，研成粉末。用热醋调匀刷涂须发，用菜叶包裹，次日清晨用酸浆水洗去。此法不损伤须发，也不会使须发红。另一方法：针砂、荞麦面各一两。百药煎研成末，用茶调匀，夜间涂抹，早晨洗去。再用诃子五钱，没石子一个（醋炒），少许百药煎，用水调和涂敷一夜，温浆水洗去，须发既黑又光亮。
(From *Bencao Shayi* / Supplement to Materia Medica)
Chen Cangqi stated: This is the fine powder ground by needle-makers. Only true steel sand is suitable for use; people often mix it with soft iron sand, flying it into powder, making it indistinguishable to others. It can also be used to dye silk black.
[Indications]
Its efficacy is similar to that of Iron Powder (Tiefen). Mixed with Myrobalan (Moshizi), it dyes hair and beard jet black (Chen Cangqi).
It eliminates accumulations, swelling, fullness, and jaundice; calms Liver Qi; and dissipates goiters (Li Shizhen).
[Prescriptions]
Ten new prescriptions included.
Rheumatic foot pain: Grind Needle Sand (Zhen Sha) and Chuan Wutou (Aconiti Radix Lateralis Preparata) into powder, mix evenly, stir-fry until hot, wrap in cotton cloth, and apply as a hot compress (from *Zhai Xuan Fang*).
Wind-bi causing cold hands: Take four qian of Needle Sand (Zhen Sha), three qian of Sulfur (Liuhuang), and six qian of Black-footed White Alum (Bai Fan), grind into powder. Moisten with hot vinegar or water, wrap in oil paper, place in a bag, and hold in hand at will. Re-moisten when cold (from *Shengji Lu*).
Spleen labor-induced yellow disease: Take four qian of Needle Sand (Zhen Sha) (stir-fried seven times with vinegar), two qian of Dried Lacquer (Ganxi) (burned to retain its nature), three qian of Cyperi Rhizoma (Xiangfu), and five qian of Pingwei San, grind into fine powder. Make pills the size of wu-tong seeds using steamed bread paste. Take with any decoction (from *Zhai Xuan Fang*).
Needle Sand Pill (Zhen Sha Wan) for damp-heat yellow sores, aiding the Spleen and removing dampness: Use an arbitrary amount of Needle Sand (Zhen Sha), grind off all rust, wash until white. Soak in rice vinegar in an iron pot to a depth of one finger, stir-fry until dry, then stir-fry three to five more times until red-hot, then remove. Take half sheng of aged Jingmi (Oryza Sativa Germen), soak in water overnight, pound into powder, form into blocks, cook until half-done, pound until mushy. Add two and a half liang of Needle Sand (Zhen Sha) and one and a half liang of Baicaoshuang (Carbonized Herba Artemisiae Argyi), pound a thousand times, make pills the size of wu-tong seeds. Take fifty pills each time, washed down with wine infused with Acanthopanacis Cortex (Wujia Pi), Achyranthis Bidentatae Radix (Niuxi Gen), and Chaenomelis Fructus (Mugua). If diarrhea occurs upon initial intake, it indicates the source of the disease is being expelled (from *Qiankun Shengyi*).
Edema with oliguria: Take three qian each of Needle Sand (Zhen Sha) (boiled in vinegar and stir-fried dry), Polyporus (Zhuling), and Pheretima (Dishilong). Grind into powder, mix with juice of Allium fistulosum (Congxian) to form a paste, apply to the umbilicus about one cun thick, bind firmly. Continue until urine output increases significantly. Change twice daily. Adding Kansui (Gansui) is even better (from *Desheng Tang Fang*).
Unremitting diarrhea, unresponsive to various medicines: Same prescription as above, but do not use Gansui (from *Yixue Zhengchuan*).
Deficiency-cold dysentery with intestinal slipping and incontinence: Take seven and a half qian of Needle Sand (Zhen Sha), one qian of Guigui (Cinnamomi Ramulus), and one qian of Ku Fan (Alumen). Grind into powder, mix with cool water to spread on and around the umbilicus, bind firmly. One should feel intense heat; if too hot, moisten with water. Can be used three to four times. This method is named "Yu Bao Du" (from *Ren Cun Fang*).
Neck goiter (Qi Ying): Soak Needle Sand (Zhen Sha) in a water vat. Use this water for drinking and cooking. Replace the sand every ten days. It will naturally dissipate after half a year (Yang Renzhai, *Zhizhi Fang*).
Dyeing white hair and beard: Take one liang of Needle Sand (Zhen Sha) (stir-fried seven times with vinegar), four qian each of Hezi and Baiji, six qian of Baiyaojian, and two qian of Lüfan. Grind into powder. Mix with hot vinegar and brush onto hair and beard. Wrap with vegetable leaves. Wash off the next morning with sour liquid. This method does not damage the hair nor turn it red. Another method: Take one liang each of Needle Sand (Zhen Sha) and Qiaomian (Buckwheat Flour). Grind Baiyaojian into powder, mix with tea, apply at night, and wash off in the morning. Then take five qian of Hezi, one Meishi Zi (Arecae Semen) (stir-fried with vinegar), and a small amount of Baiyaojian. Mix with water, apply overnight, and wash off with warm sour liquid. The hair becomes black and shiny.