Comment by uxhacker
7 hours ago
The issue is that it does yellow but after 25 to 50 years. The challange is that it is very difficult to reverse.
On the restoration of my house I allow its use on very specific cases. It very useful for example in strengthening wood that has rotten. Sometimes Paraloid is the only thing that can be used, but it needs to be used with care.
You can see the research here : https://www.woodresearch.sk/wr/201104/07.pdf?utm_source=chat... and here https://www.researchgate.net/publication/400226168_Aging_Mec...
It does not turn yellow, Paraloid B66 does. B72 has a low Tg, 40°C, so it can soften and creep when warm
It does discolor over time. The point is that one should be thinking about the impact over centuries and not years. It needs to be used with care and other alternatives need to always be considered.
For a painting or building that has survived for half a millennium we need use methods that will preserve the object for another 500 years.
Too many times I hear people say we will just use Paraloid.
Didn't really know of the different 9(!) versions of it. Thanks for pointing it out.
Agreed. My gf uses it regularly as she's a furniture restorer, finding the definition here it's a bit of a surprise, though. Great, unique material.