Dissolving of carbon from top bga chips is very simple and easy, All you need are concentrated sulfuric acid not less than 98% and the heat must be stable not going down, boiling points of sulfuric acid 337c, since wood charcoal produces heat 426c-537c so I insulate my steel plate to control the heat from wood charcoal not exceeding the boiling points of sulfuric acid, don't forget the PERSONAL PROTECTIVE EQUIPMENT PPE.
