| FORUM | ARCHIVE | | TOTAL QUIZ RESULT | |
Welcome stranger, click here to read about some of the great benefits of registering for a free account with us and joining us in our global online community. |
Suggestions For Removing Bronze Oxidation. |
Post Reply ![]() |
Author | |
GeorgeI ![]() Immortal Guard ![]() ![]() Joined: 20 Jun 2020 Location: Airway Heights, Status: Offline Points: 5 |
![]() ![]() ![]() ![]() ![]() Posted: 20 Jun 2020 at 20:23 |
This is a 6" x 1" Zhou through Han dynasties, 1027 BC to 220 AD bronze ritual dish. When first discovered on the floor of a fresh water lake, it had additional crusty/flakey like oxidation that came off fairly easy. It is now left with the oxidation shown, that is hard and firm to the base bronze. There are very detailed and beautiful motifs beneath and would like to know if you guys might know of a way it can be separated from the bronze. It is hard enough and firmly stuck enough to the bronze that I do not want to attempt any kind of stiff brushing and the like for fear of damaging the underlying motifs. There are still some traces of what looks like malachite. Any help greatly appreciated ! ![]() ![]() ![]() Here are a few pictures taken under a Fluorescent light. ![]() ![]() ![]() ![]() Here are a few taken in the sunlight. ![]() ![]() ![]() ![]() ![]() Edited by GeorgeI - 26 Jun 2020 at 08:29 |
|
![]() |
|
Sponsored Links | |
![]() |
|
Vanuatu ![]() Administrator ![]() ![]() Joined: 24 Feb 2015 Location: New England Status: Offline Points: 2884 |
![]() ![]() ![]() ![]() ![]() |
Hi GeorgeI, welcome!
I will make an inquiry, exceptional item!
|
|
Still round the corner there may wait, a new road or a secret gate. (J. R. R. Tolkien)
|
|
![]() |
|
Novosedoff ![]() Colonel ![]() Joined: 28 Mar 2020 Location: Moscow Status: Offline Points: 529 |
![]() ![]() ![]() ![]() ![]() |
The easiest way to clean the bronze item is to use lemon juice mixed with soda or vinegar mixed with salt
|
|
I teach history to children, and I am proud that they leave my classes permeated with sh*t and hatred to meet the real world.
I see my personal historic mission in bringing madness to juvenile masses. |
|
![]() |
|
franciscosan ![]() WorldHistoria Master ![]() Joined: 09 Feb 2015 Location: Littleton CO Status: Offline Points: 10968 |
![]() ![]() ![]() ![]() ![]() |
I would suggest you stick to the recommendations on forumancientcoin. Do you feel like you _have_ to do something?!? You might try to find a restorationist who deals with bronzes.
|
|
![]() |
|
GeorgeI ![]() Immortal Guard ![]() ![]() Joined: 20 Jun 2020 Location: Airway Heights, Status: Offline Points: 5 |
![]() ![]() ![]() ![]() ![]() |
I could use some help.. Had an XRF test done today with an Olympus tester. 98% copper 1% lead Less than 1% iron Not sure what to make of the test results. It seems if this were a Chinese piece, the results would be a good sign. But not sure what these numbers mean for early Middle Eastern copper.
|
|
![]() |
|
franciscosan ![]() WorldHistoria Master ![]() Joined: 09 Feb 2015 Location: Littleton CO Status: Offline Points: 10968 |
![]() ![]() ![]() ![]() ![]() |
What does XRF stand for? I wonder about trace elements, most analyses I see include trace elements. Refinement processes not being what they are today. Thinking of bronze and silver Roman coins specifically.
X-ray florescence?
|
|
![]() |
|
GeorgeI ![]() Immortal Guard ![]() ![]() Joined: 20 Jun 2020 Location: Airway Heights, Status: Offline Points: 5 |
![]() ![]() ![]() ![]() ![]() |
Yes.. |
|
![]() |
|
GeorgeI ![]() Immortal Guard ![]() ![]() Joined: 20 Jun 2020 Location: Airway Heights, Status: Offline Points: 5 |
![]() ![]() ![]() ![]() ![]() |
With a little more research, it looks the surface material may be the results of something called, "bronze disease", a form of corrosion that affects copper, and copper based artifacts. Here is just one example showing bronze disease for a copper coin, and a little reading from a metal detecting website, https://www.metaldetectingworld.com/cleaning_coin_p3_patina.shtml ![]() There are chemical bath solution methods for removing, but I am reluctant to try them. https://www.metaldetectingworld.com/cleaning_coin_p17_copper.shtml Edited by GeorgeI - 26 Jun 2020 at 10:44 |
|
![]() |
Post Reply ![]() |
|
Tweet
|
Forum Jump | Forum Permissions ![]() You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |