Hi fran, It will need to be sealed to cope with wear and tear. To answer your question, the only way to observe the unknown is to test. You don know the glaze composition or the firing temp so testing these with the process of decoration is recommended, otherwise you could ruin your sink forever.
Hi fran, It will need to be sealed to cope with wear and tear. To answer your question, the only way to observe the unknown is to test. You don’t know the glaze composition or the firing temp so testing these with the process of decoration is recommended, otherwise you could ruin your sink forever.
