The formulae for rokushō are not published widely or freely, but passed on in the Japanese craft tradition.  However, some scholars have analysed samples of the material.
Premixed rokushō can be purchased outside Japan through specialty jewelry suppliers. Additionally, several different formulas have been proposed to replicate the traditional product for those who prefer to make their own:
* In a container made of glass, porcelain, or copper, dissolve 6g copper acetate, 2g calcium carbonate, and 2g sodium hydroxide in 150ml water. After a week, siphon or decant the clear liquid from the top; just before use, add another 2g copper sulfate.
* Dissolve 4g copper acetate, 1g copper nitrate, 1g cupric chloride, and 4g copper sulfate in 1 liter of distilled water.
* Dissolve 60g copper acetate and 60g copper sulfate in a 2-liter solution of white vinegar diluted 5-12% with water.
Rokusho is not used alone, but mixed with one or more other chemicals.  Further, metal to be processed is cleaned in advance of treatment, using a mild acid bath (oxalic or sulfuric acids are frequently used), scrubbing with daikon radish or pumice, and/or a surface abrasive, and often treated after patination also.