Photoplate

How to make a photoplate to etch brass or copper using dry film.

 

Apply film to metal

Insert film covered metal in negative image.

Expose and keep in dark place 5 to 15 minutes.

Remove top film. Develop in Na2Co that has been heated to 30 – 40 degrees C. Adjust concentration to develop in 1 to 3 minutes.

Wash with water and dry.

Etch in Ferric Chloride 20% Water 80%

Wash

Remove film in NaOH.

 

 

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