How to get black marks off pottery?

To effectively remove black marks from pottery, especially stubborn ones, Bar Keepers Friend is highly recommended for its exceptional cleaning power.

Understanding Black Marks on Pottery

Black marks on pottery are typically not dirt or grime, but rather tiny deposits of metal transferred from utensils, cutlery, or other metal objects that have rubbed against the ceramic surface. These microscopic metal particles adhere to the pottery's glaze, appearing as dark, unappealing streaks.

Effective Solutions for Removing Black Marks

The best approach depends on the severity and depth of the black marks.

1. For Major and Stubborn Black Marks: Bar Keepers Friend

For prominent or deeply ingrained black marks, Bar Keepers Friend is remarkably effective. Its active ingredient, oxalic acid, helps to dissolve metal and mineral stains without causing damage to the pottery's glaze when used correctly.

• How to Use:
  1. Lightly dampen the area of the pottery with the black mark.
  2. Apply a small amount of Bar Keepers Friend (available in powder or liquid form) directly onto the mark.
  3. Using a soft cloth or sponge, gently rub the marked area with circular motions. Avoid using abrasive scrubbers that could scratch the pottery.
  4. Rinse the pottery thoroughly with clean water to remove all residue and dry it with a soft towel.

2. For Moderate Black Marks: Baking Soda Paste

Baking soda can be a very good option for black marks that are not too severe. Its fine, crystalline structure acts as a mild abrasive, gently lifting surface stains and marks.

• How to Use:
  1. Create a thick paste by mixing a small amount of water with baking soda.
  2. Apply the paste directly to the black mark.
  3. Using a soft cloth or sponge, gently rub the paste over the mark until it begins to fade.
  4. Rinse the pottery completely to remove any baking soda residue.

3. For Minor Scratches or Light Surface Marks: Salt

For very minor, barely visible scratches or extremely light surface marks, common table salt can offer some assistance due to its mild abrasive nature. However, it is generally less effective for distinct black marks compared to baking soda or Bar Keepers Friend.

• How to Use:
  1. Dampen the affected area on the pottery.
  2. Sprinkle a small amount of salt onto the mark.
  3. Gently rub with a soft, damp cloth or sponge.
  4. Rinse thoroughly.

Methods to Avoid

While some household items are often suggested for cleaning, certain options are ineffective for removing black marks from pottery:

• Toothpaste: Attempts to remove black marks using toothpaste, even with a toothbrush, have shown to be ineffective. It does not possess the necessary chemical or abrasive properties to tackle metal transfer marks on pottery.

Quick Reference: Black Mark Removal from Pottery