I want to do etching of my designs on metal sheets. can anyone tell me the name of chemicals involved?

I want to make various metallic products using etching, I want to follow this procedure – 1. apply photoactive solution(???) on metal plate uniformly. 2. place design on transparent sheet on metal plate. 3. exposing metal plate . 4. removing transparent film and washout unexposed part. 5. dipping metal sheet in acid bath (???) for a particular time(???) for desired etching (???)…. Please provide me with the name of chemicals to be used… A detailed procedure on etching would be very helpful. Thanks