How was Daguerre's "silver plate method" photographic process invented?

1837, based on the sunlight etching method in Nieps, Daguerre successfully fixed the photosensitive silver-plated copper plate by soaking it in heated brine. This photographic work of silver-plated metal plate, which was successfully fixed for the first time, is now collected by the French Photographers Association. Daguerre's photographic work Still Life has exquisite pictures, rich levels and clear details, and is full of artistic flavor of classical painting.

This "silver plate method" photography process still seems to have beautiful visual effects. 1838, Daguerre sold his "silver plate method" and Niepce's solar etching method for 200,000 francs, and turned to the French government because nobody cared. Thanks to the efforts of arago, a famous French parliamentarian, on August 1839, the French Academy of Sciences and the French Academy of Fine Arts held a joint meeting, announcing the birth of a major invention in Paris, France, and officially pushing Daguerre's photography technology to all mankind.