Depends on the blade for me. Sheffields get about 10-20 dry on a coticule. American blades get 50-60 on a black or trans ark with water or Smith's solution (not their oil). German blades usually either same as American or sometimes Thuringian for 10-20.

When that will no longer do it I will go back to 4k, then complete the progression. Unless the bevel has been chipped or dinged that usually does it for me.