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Answer:
A teacher, who is studying the field related to this question, kindly answered this question.
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The “silver mirror reaction” is used as a way of detecting aldehydes in high school, but we can also say that the reaction is for chemical plating.
If there is something in solution that can work as a core, metals in solution are more likely to be deposited. Since every part of a glass surface can work as a core, the whole surface of the glass is plated as the deposition proceeds. The surface is smooth.
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Silver mirror reaction
Courtesy of
Mr.
Peter Keusch
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The surface of deposited silver can also work as a core. In this case, since the surface of silver is covered by solution, the silver is deposited preferentially at one particular position on the solution side. Then silver crystals are deposited there. If you observe the surface with a magnifying glass, you will notice that the surface is rough.
These are the reasons for the questions. If you want to plate with a metallic luster, it is necessary for you to redesign the plating solution.
Acknowledgement
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