Peroxide is still sitting in it.
How do I safely bleach the crazing on this antique?
This 115 year old notable piece of China is crazed or alligatored totally, inside and out. I’ve has 3% hydrogen peroxide sitting in the bottom for 24 hours and it’s not done a thing. Im not going to put chlorine bleach in there, as someone might put food in it someday later. Chlorine bleach will stay in the fine cracks.
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I truly don’t believe you can do anything to fix that.
I have always used bleach. Works great. Then washed it in hot soapy water the next day. I'm not dead yet. We use a teaspoon of bleach in water to clean our fruit and vegis to get rid of pesticides. It would hurt you if you clean it off.
See if these help at all.
https://www.instructables.com/id/REMOVING-STAINS-AND-CRAZING-LINES-DISCOLORATION-FR/
https://www.hunker.com/13423322/how-to-remove-stains-in-crazing-in-porcelain-dishes
As an antique English Ironstone collector, I would never use bleach to soak or clean crazing from a dish. The bleach might work, but it might also make the dish "bloom". Blooming means that the glaze has been eaten away by chlorine bleach which allows the base material to leach out from below the glaze making it feel powdery on the surface. There is no cure for blooming once the piece is damaged. You could continue trying the Peroxide or try OxiMagic (Chlorine and bleach free). Or you could just wash the dish and leave it alone---many people love the patina created from crazing. Good luck!
I wouldn’t bleach this or use it for food anymore. I used to work for a fine China retailer and we always told people to stop using dishes that had crazed, as there may be bacteria or other bad stuff that’s found it’s way through the cracked glaze and into the China.
I too collect ironstone (and tons of other) china, and I do have a recipe for this, it involves peroxide from a beauty supply store and the whole process takes weeks. I will find it and post here
Try a slurry paste made of baking powder and hydrogen peroxide.
Meant baking soda.
This is super old, but did you ever find the answer to cleaning it?
I did get it “fixed”. I made a bath of 16 Oz of 3% hydrogen peroxide and 8 Oz of 30 volume hair peroxide (bleach) and 2 scoops of Oxyclean.
No blooming.
i dont think there ia a safe way
CLR . It is safe for cleaning coffee pots . And Orange oil cleaners and time .