ID: 
82
Maker's Name: 
Unknown
circa 1965
Dimensions: 
21.1 × 16.6 × 3 cm

This frame holds stencil and copper sided board together, while the assembly is exposed to a strong light source, or UV source. When the board is subsequently placed in an etching solution (Ferric Chloride or Hydrogen Peroxide) the copper is removed where it was not covered by black areas on the stencil.