4 ms·
It is hard to make transparnet materials that are colorless block a lot of UV. Not surprised most fail the test.
by mensetmanusman 1y ago
It is hard to make transparnet materials that are colorless block a lot of UV. Not surprised most fail the test.
- gtowey 1y agoI don't think anyone is going to argue that it's hard to do that, but I think overstating their efficacy is what we should be worried about.