Advantages and disadvantages of solar etching method

The advantage of sunlight etching method is that it can directly capture and fix images, but the disadvantages are high operation difficulty, long exposure time and inaccurate color tone.

Sunlight etching, also known as sunlight photography, Nipps painted a mixture of pewter and asphalt on a lead-tin alloy plate to make a photosensitive metal plate. He put it in the camera, then exposed it to the window in his attic with sunlight and the original lens for 8 hours, and then washed off the white asphalt mixture without exposure hardening with lavender oil.

Expose the dark black of the metal plate and you will get the positive image of the scenery outside the window. Nipps and Daguerre were the earliest collaborators in photographic research. Both of them tried to find a way to record images, but their motives were different and their achievements in photography were different. Nipps's attempt to study printing involves the exploration of photography.

His earliest "solar etching method" with Jewish asphalt as developing material is an image formed by using the principle that substances harden under ultraviolet radiation. The research scope of Nieps almost spans the two major image series of silver salt and pigment in today's photography technology. Although he didn't see the day when photography was published, he didn't know what photography was, just wanted to find a way to record it manually.