Letterpress Bronzing.

Kolbach Bronzing MachineBy far the greater bulk of let­ter­press work in gold is pro­duced by bronz­ing, and the res­ults obtained by this method are excel­lent.
The pro­cess involves, first, print­ing the sheet in a tacky medium such as bronze pre­par­a­tion and then dust­ing it with bronze powder which adheres to the pre­par­a­tion.
It is then lightly burn­ished to smooth and brighten the bronze and then the loose bronze is cleaned off the sheet.
Small work can be bronzed by hand, but the work must be car­ried out under vacuum.
Bronz­ing machines have been avail­able for a period of years.
During the 1960s  if you did any bronzing whatsoever you had to drink a pint of milk a day (paid for by the Boss).
What the milk had in it to neutralise any bronze powder in the air I will never know.
Then in the early 1970s some bright spark said we would have to start drinking a bottle of Coca Cola a day.
Now that did make me feel worse.
via Gold Ink, Bronzing and Foil Printing | British Letterpress.

One thought on “Letterpress Bronzing.

  1. “. . . neutralise any bronze powder in the air . . .” – poppycock!
    You drank the milk to settle the crap in your guts, rather than it settle in your lungs!
    As an apprentice hand-comp I would sweep the floor, clean space bands with graphite, pour metal from the smelter to make “fish” and run the Elrod. After any those chores I was told “Don’t forget to drink your milk!”.
    Those in charge knew exactly why you drank the milk!


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