2006-12-23 00:29:32 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Take the glass piece on which etching is to be done.
Coat it with wax.
Now use a pointed substance to draw the design to be etched.
Now pour the HF liquid are pass HF vapours over the piece.
The exposed surface, without wax ,having design will react with HF
Glass contains silicates of Ca and Na which react with HF forming water soluble as well as volatile substances which can be removed by washing.
The non-exposed portion doesn't react as wax does not allow it to.
Thus we get and etched surface.
2006-12-23 00:53:17 · answer #1 · answered by amudwar 3 · 0⤊ 0⤋
Chemical etching (sometimes called chemical milling or wet etching) is the process of using acids, bases or other chemicals to dissolve away unwanted materials such as metals, semiconductor materials or glass. It has applications in the printed circuit board and semiconductor fabrication industries.
Hydrofluoric acid (HF) is a very efficient etchant for glass. It is however very dangerous if it comes into contact with the body.
hope this helps
2006-12-23 09:12:37 · answer #2 · answered by For peace 3 · 0⤊ 0⤋
using HCl
2006-12-24 09:54:34 · answer #3 · answered by Akshay 2 · 0⤊ 0⤋
Look up "hydrofluoric acid".
2006-12-23 08:36:35 · answer #4 · answered by Gervald F 7 · 0⤊ 0⤋
by making your hands work
2006-12-24 13:54:00 · answer #5 · answered by gj 4 · 0⤊ 0⤋