There is no rule, even not for room temperature. You will find cartridges which need a "warm up"the way you describe, a definite room temperature, some are very sensitive to VTF, some need 5h to "break in", some 50h and so on and on...and there are others which do not need that.
Mine for example are ready to go for 100% from scratch. Except the Lyra Titan i / Olympos, those demand a nice room temperature :-)
Mine for example are ready to go for 100% from scratch. Except the Lyra Titan i / Olympos, those demand a nice room temperature :-)