Similar to Cherry MX Reds but with heavier springs.
Older (pre 1994) Cherry MX Black Switches are in high demand due to being far smoother than modern Cherry MX Black switches. This is due to a change in mold tooling – which is why newer switches are often referred to as “retooled”.
Introduced during CES 2020, these switches feature the new Cherry "Hyperglide" tooling which results in increased smoothness and tighter tolerances.
A force-graph is a good way to help imagine how a switch might feel to the press. Many reputable manufacturers publish such graphs, either in their documentation or in their patents.
Not sure what you’re looking at? Check out Haata’s fantastic guide on reading force curve graphs.
To achieve a smooth butter feel Cherry MX Blacks are great with a thicker lube such as Krytox GPL 205 Grade 0.