diff --git a/README.md b/README.md index aa15639..8a83603 100644 --- a/README.md +++ b/README.md @@ -3,4 +3,4 @@ Design files related to a photo-sensitive layering method etching machine everyo ## Architecture The etching machine consists basically out of two parts. The first part is a UV light, which is used to develop a photo-sensitive PCB. Once this has been done. The PCB has to be treated with sodium hydroxide (NaOH) dissolved in water. This removes the UV-sensitive plastic, where it has been tackeled by the light. -The second part is the actual etching machine, which is designed to be compatible to euro cards (and even bigger ones). The etching machine is either filled with sodium persulfate (Na2<\sub>S2<\sub>O8<\sub>) or iron(III) chloride. +The second part is the actual etching machine, which is designed to be compatible to euro cards (and even bigger ones). The etching machine is either filled with sodium persulfate (Na2S2O8) or iron(III) chloride (FeCl3).