Citric Acid: Non-Toxic Post-Cast Jewelry Cleaning Solution

Clean your castings the smart way.

Citric acid is a gentler alternative to post-cast cleaners for jewelers, metalsmiths, and small-batch casters. It’s non-toxic, safe to store, and won’t fill your space with sulfur fumes. Just dissolve, heat, and drop your pieces in, and scrub with a toothbrush to help remove oxides and other surface impurities.

This is pure, food-grade citric acid

• Works on silver, brass, bronze, copper, and gold alloys
• Dissolves instantly in warm water
• Reusable — monitor pH and keep it going
• Low-waste alternative to harsh commercial cleaners
• Safe to decant and filter for reclaimed metals

Batch Sizes Available:
• 50g (approx. 1.76 oz) – makes 250mL / 8.4 fl oz
• 100g (approx. 3.53 oz) – makes 500mL / 16.9 fl oz
• 200g (approx. 7.05 oz) – makes 1L / 33.8 fl oz

Use Hot (140–160°F / 60–70°C) for best results.
Store in a sealed container between uses.

For the modern maker.
Ships from the PNW, USA.

Every order supports Aetherium Innovations and our mission to develop tools and technologies that lower costs and learning barriers in the skilled art trades.