[Nhcoll-l] Repairing historical glass lid

[Dr Jonathan Kemp]

HXTAL NYL-1 is a conservation grade epoxy resin specifically designed 
for the conservation of glass and ceramics by Norman Tennent; it doesn't 
yellow and is resistant to most solvents after curing incl. ethanol. It 
does not expand. there are plenty of online information and howtos incl. 
this one https://www.hisglassworks.com/manuals/hxtal_instructions.pdf?

Jonathan

On 2/11/24 02:56, Douglas Yanega wrote:
> On 11/1/24 8:12 AM, Menard, Katrina wrote:
>> Does anyone know if there is a glue/epoxy that we could use to 
>> stabilize the cracks in the jar lid that won’t react with the ethanol 
>> preservative? Further, I’m not sure if there is a glue that won’t 
>> expand too much that it will further compromise the seal while we 
>> look for a more permanent solution.
>
> I suspect the real question is how permanent do you mean by permanent. 
> There are a fair number of options for creating a gasket or seal, and 
> there's a lot of variation in how long they can be expected to hold up 
> over time. For example, just some inert glassware grease of some sort 
> would be easy to apply, and easy to re-apply in the future, though not 
> strictly speaking permanent. We have some enormous relaxing jars, 
> sealed only with grease, and the water in these jars hasn't evaporated 
> yet (I've been here 25 years, and these jars pre-date me) but we can 
> open and close the jars just fine. I think once I had to add like a 
> fingertip worth of fresh grease to one of them in that time, because 
> it had become almost impossible to get the lid off. I don't see why a 
> crack can't be sealed the same way.
>
> Peace,
>