How To Antique Brass

How to Antique Brass

Related Words
patina brass, antique metal finish, antique brass metal, antiquing brass, brass darkening, oxidize brass, brass antiquing, brass oxidation, brass patina, aging brass

Vintage (looking) metals have become increasingly popular in jewelry making. The process of giving metal a vintage or antique look is variously called darkening, oxidizing, patinizing or antiquing.

Brass is the most common metal to undergo antiquing in jewelry making.

There are various ways to create antique brass which can be done at home. (You can also find out how to antique copper).


First: Clean the Brass

For you to be able to oxidize the brass so that you can quickly achieve a rich aged patina on the metal, raw brass must be used. However most brass components come with some protective varnish. And grease (like from fingers during handling) is also deposited on the surface. These must be removed thoroughly before the antiquing process begins.

The varnish, grease, and dirt on the metal surface will prevent those areas from antiquing properly, if at all.

To remove protective varnish

  • Acetone, nail polish remover, or lacquer thinner will remove any protective varnish from the surface.
  • If brass component is small, you can boil it in water for a few minutes.

To remove general grease and dirt

Clean brass component completely with any of the following:

  • mild solution of water & vinegar or
  • mild soap diluted in water or
  • mixture of ammonia, mild soap, & water
  • rub surface with alcohol
To check that the metal is completely clean, pour water over it. If the water runs fully over it with no beading up, then it is clean.

How to Darken/Oxidize/Antique Brass

Here is a collection of various methods that you can try out. Experiment with the various antiquing metals to discover your own favourite.

Ammonia Fumes

Suspend your brass items over ammonia that is in a covered jar, making sure that the brass components do not come into contact with the ammonia. You can use fishing line or nylon stocking to suspend the metal. Secure it to the bottle with rubber band or sticky tape on the outside. Then lid the jar.

This can take a few hours. Check on progress and determine when you are satisfied with the color changes.

After this process, leave the antiqued brass items out in the open for a while to get rid of any lingering ammonia smell.

Clorox

Soaking brass in Clorox (toilet bowl cleaner) will help dull the brightness and tone down the brassy, shinny tone without leaving a brown patina on brass.

Saltwater

Brush the brass items with saltwater. This is slower than brushing with vinegar but it produces a different patina - possibly a more "antiqued" look.

Vinegar; Brush or Spray with

Brush or vinegar over the entire surface of the brass items. Allow to dry and check results. Reapply and dry repeatedly till you get the patina colour you want. This method should give you a quick darkening of the brass.

For better results, slightly heat the brass components in a low-heat oven before applying the vinegar.

Vinegar Vapors/Fumes

Suspend the brass items over vinegar and allow the fumes to oxidize the brass. You can suspend the items using nylon stocking, cheesecloth, or fishing lines over the vinegar (not in it). Cover the entire setup with a bucket or other container to prevent the fumes from escaping.

Vinegar oxidation does darken brass but unlikely to produce a rich vintage on brass.

Commercial Products

This is a list of products that I have heard are good for antiquing brass.

  • Modern Options Patina Green Antiquing SolutionPatina Green Antiquing Solution (from company Moden Options) - can be used on copper, brass, bronze. For both indoors and outdoors. No special tools required. Water based.
    Unfortunately it seems that this product can only be gotten from misterart.com which is in USA and does not ship internationally.
  • Jax Colorant Green Patina Quart - "produces a permanent, authentic, antique green finish on copper, brass, and bronze." (part of product description)
  • Brass Darkening SolutionBrass Darkening Solution - Brass darkening solution.Turns shiny brass finish into antique finish quickly. (Is likely to work on copper and bronze as well.)

    One (Australian) site that sells this is at Watson Brass.

Protecting the Antique Finish

After the antiquing process, you can allow the brass to age/oxidize naturally. Or you can (temporarily) seal the antique finish using beeswax. Prepared beeswax like Johnson's Wax can be applied directly using a clean. lint-free soft cloth.

You can also try floor wax or a clearcoat.


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