The reason I mention this is that for reasons best known to themselves you can get the odd disc that seems to magically materialise lint out of nowhere e.g. the HFN/RR Test Disc. I've owned 2 of the HFN/RR and they persistently do this despite being regularly zapped by Zerostat (the heavily modulated grooves probably don't help but I think there's more to it than that).
Deeply grooved Pallas discs are a shining beacon of good behaviour by comparison, even at low humidity values of 40%. You literally won't see any lint, just as would happen with a freshly RCM-ed LP.
Hope this helps ;^)