Ideal Humidity and Temprature for Collection?

[Rich]

I've been collecting and studying antique knives and
swords of all types for about 50+ years. I keep mine
in the 68-78 F and 30-40% humidity year round. Never
had any trouble with rust or leather rot, wood splits,
etc. It's more drastic changes in temp and humidity
that cause problems. IMHO 70% humidity is "dripping"
wet - way, way too humid.

Rich S