How to Test Silver with an Eraser

You can test your silver at home right now using an eraser. Here’s how –

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Items Needed

1. A clean, white eraser (preferably one without colored pigments).
2. A soft cloth or microfiber towel.
3. The silver item you wish to test.
4. Optional: A magnifying glass for a closer inspection.

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Precautions to Take

1. Ensure Clean Surfaces: Both the silver item and the eraser should be clean to avoid contamination that could affect the result.
2. Avoid Over-Polishing: Excessive rubbing can scratch delicate silver surfaces, especially on antique or soft silver items.
3. Test in an Unnoticeable Area: If possible, choose a discreet spot to test, especially for valuable or sentimental pieces.
4. Understand the Limits: This test indicates whether an item might be silver but doesn’t confirm the purity or differentiate between sterling silver and silver-plated items.

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Step-by-Step Instructions

Step 1: Prepare the Silver Item

• Wipe the item with a soft cloth to remove any dust or surface grime.
• Choose a small, inconspicuous area on the item for the test.

Step 2: Rub with the Eraser

• Take the white eraser and gently rub it on the selected area of the silver item.
• Apply consistent but light pressure for about 10-15 seconds.

Step 3: Observe the Results

• Look closely at the area you rubbed. Authentic silver will typically show a faint black or grayish mark on the eraser. This discoloration happens due to silver’s reaction with oxygen, forming a layer of tarnish.
• If the eraser remains clean or shows no discoloration, the item may not be real silver or could be heavily plated.

Step 4: Clean the Tested Area

• Wipe the tested area with a soft cloth to remove any eraser residue.
• If needed, use a mild silver cleaner to restore the shine.

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Tips and Tricks

• Use a Quality Eraser: A white eraser without added dyes ensures no false color marks.
• Test Against Known Silver: Compare the result with an item you’re certain is silver to familiarize yourself with the expected discoloration.
• Combine with Other Tests: For greater confidence, follow up with additional methods, such as the ice test or magnet test, to verify authenticity.
• Document Your Results: Photograph the item before and after testing to track any changes, especially for valuable pieces.