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I broke a coffee mug over the weekend, it was new, I wanna fix it.

Looks like stake of the art is Epoxy and most epoxy isn't food safe?

Art Resin brand Resin is FDA certified food safe (they say FDA certified and in Canada and Great Britain and 13 other countries, which is a claim you can't make without getting in very fraud, but also worthless), but it only allows up to 50°C before that's worthless.

The MSDS on other resins and epoxies seems to be not food-safe?

Anyone know how to fix a coffee cup?

Was thinking maybe finding some non-PB tin?

#ceramics
#repairability #repair

#repair #ceramics #repairability
Tuxedo Wa-Kamen
Tuxedo Wa-Kamen  
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The classic japanese way would be to use gold.
silverwizard
silverwizard  
@wakame yeah- that practice got me thinking about this, but uh, trying to be more frugal
@Tuxedo Wa-Kamen
silverwizard
silverwizard  
Fun fact - there are a billion articles on how to do this - all made by an LLM who doesn't know what food safe is and is just recommending random glues
chiasm
chiasm  
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Wild, I would have just grabbed some super glue, but Gorilla glue says specifically don't use where it might come in contact with food, now that I check...
Resuna
Resuna  
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Kintsugi?

https://www.amazon.com/Chimahaga-Food-Safe-Kintsugi-Repair/dp/B0B1MGXD27

https://www.amazon.com/Kintsugi-Repair-Food-Resin-Based/dp/B0C2VGD13R

This entry was edited (1 year ago)
silverwizard
silverwizard  
@Resuna The problem is that for those kits I'd want to see their heat data and food safety data, since a lot of the examples are cold examples.
@Resuna
Kicou
Kicou  
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Lead?

(don't listen to me)

silverwizard
silverwizard  
@Granny Art (Shrimp)vis.soc mod @Surly Amy Gotta use the right epoxy - needs to be similarly strong. I am repairing the side, not the handle, which holds weight.
@Granny Art (Shrimp) (Joni) @Surly Amy
silverwizard
silverwizard  
@Steven Hoefer Yeah, raw melted tin with a silicone heat resistant brush and melted tin is *probably* enough - but uh - yeah - not super duper safe.
@Steven Hoefer
Gabor Heja
Gabor Heja  
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@artcollisions @SurlyAmy I was about to jokingly suggest that you could drill, tap and use screws/bolts, but then my Google search resulted in ceramic bolts and now I want one. Or a bag of them. They look too nice but even more fragile.

If I had to repair a mug I'd either use the 50 °C resistant epoxy and hand wash it afterwards or (if it'd be the handle) use any temperature resistant glue anyways.

(Photo source: https://www.ortechceramics.com/products/ceramic-screws/ceramic-screws-2/ )

Ceramic screws and bolts.
Ceramic screws and bolts.
@Granny Art (Shrimp) (Joni) @Surly Amy
silverwizard
silverwizard  

@Gabor Heja @Granny Art (Shrimp)vis.soc mod @Surly Amy The probably is less the washing and more the making coffee directly in it with 100°C water.

Those bolts look really cool - I wonder what primary use for them is.

@Granny Art (Shrimp) (Joni) @Surly Amy @Gabor Heja
harryprayiv
harryprayiv  
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@rasterweb Here’s a rabbit hole directly related to repairing broken pottery:

https://youtu.be/MIoi-DSm0e4


The Unknown Master of Restoration - NHK WORLD PRIME

Watch more documentaries on NHK WORLD-JAPAN!https://www3.nhk.or.jp/nhkworld/en/ondemand/category/15/?cid=wohk-yt-2203-masterrestoration-hpMore quality conten...
YouTube
@Pete Prodoehl 🍕
This entry was edited (1 year ago)
Gabor Heja
Gabor Heja  
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Oh... I did not consider that... maybe I should also make a coffee.
Shelenn Ayres
Shelenn Ayres  
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@silverwizard duct tape the outside? hahah
@silverwizard
Dan Lyke
Dan Lyke  
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Cyanoacrylate? It's hard to wade through the AI generated link spam on Google for info on food safety (this one claims Krazy Glue is, Krazy Glue's site is less positive https://tbbonding.com/is-tech-bond-food-safe/ ), but I know there are wound contact formulations...

Is Tech-Bond "food safe"?

As long as Tech-Bond adhesives do not come into direct contact with food, the FDA leaves the decision of whether the adhesive is food safe to the manufacturer. Our SI and BP Blue adhesives are ethyl cyanoacrylates.
Don Meyers (Tech-Bond Molecular Bonding Systems.)
silverwizard
silverwizard  

@Dan Lyke Yeah - that says safe if not in direct contact with food - which I don't think works since it's a large broken chip. But yeah! This is it! An hour of LLM spam to find something and then read data and not quite right.

The wikipedia page definitely supports the reading that it's probably not good for eating off of.

Also! Thanks so much for digging for me!

@Dan Lyke
Dan Lyke
Dan Lyke  
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Yeah, for personal use I'm cavalier enough that wound safe sounds good enough to me, the standards for food safe are amazingly high, but I'm also getting to the "at some point the long term risk factors become less concerning" age...

Are the platinum cure silicones clear? Because that might work for a chip.

silverwizard
silverwizard  

@Dan Lyke Damnit - I'm an idiot - just checked the silicon *literally sitting on my desk right now*

It's safe to eat out of and heats to 400 degrees F

@Dan Lyke
Hypolite Petovan
Hypolite Petovan  
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@silverwizard This was a cheeky guess. A more general guess would be strong electromagnetic field applications where metal screws could interfere with the fields.
@silverwizard
Joshua A.C. Newman
Joshua A.C. Newman  
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Epoxy is food safe when cured. Mix it completely and give it a day to cure.

Superglue (cyanoacrylate) also works fantastically on ceramic even though it was developed for medicine.

silverwizard
silverwizard  
@Joshua A.C. Newman :condemned: What do you mean food safe when cured? Is there a test for this? I am a little bit cautious about this kind of thing - it seems to be the case for Art Resin but not all resins? But the problem there is debonding at high temp?
@Joshua A.C. Newman
silverwizard
silverwizard  
@Joshua A.C. Newman :condemned: And I wanna be clear - I'm probably more intense than most in this situation
@Joshua A.C. Newman
Joshua A.C. Newman
Joshua A.C. Newman  
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Yeah, I see that. So, if Art Resin is certified, why wouldn’t you use that? (Or cyanoacrylate, which is cheaper, very fast-curing, very strong, and originally for medical purposes?)
Joshua A.C. Newman
Joshua A.C. Newman  
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Oh, right. 50°C.

You’re going to be happier with CA.

Joshua A.C. Newman
Joshua A.C. Newman  
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Cured epoxy is nonreactive. It’s used to make artificial body parts. If you’re worried about leftover, uncurred resin or hardener, they both dissolve in acetone so you could wash it afterward.

However, if the fit is still good, superglue will be easier. And that stuff cures quick and completely!

Surly Amy
Surly Amy  
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@artcollisions TBH, I don’t know of any truly safe way to repair ceramic mugs that makes them useful again. Only ways that makes them decorative.
@Granny Art (Shrimp) (Joni)
Surly Amy
Surly Amy  
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@gheja @artcollisions ceramics are often used on the surface of spacecraft and other high temp objects because they can withstand higher temperatures than metals that melt so I’m going to assume it’s for that instead of firearms and pretend society isn’t garbage. Hahaha
@Granny Art (Shrimp) (Joni) @Gabor Heja
Surly Amy
Surly Amy  
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@semiotic_pirate @artcollisions you can’t use the gold to eat out of tho. It’s not food safe. Just decorative. And not strong enough to hold a handle.
@Granny Art (Shrimp) (Joni) @Fjord In Progress
Surly Amy
Surly Amy  
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@semiotic_pirate @artcollisions that’s a good question. I’ll ask my dentist in two weeks!
@Granny Art (Shrimp) (Joni) @Fjord In Progress
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