> Espresso is typically made with 9 bar of pressure. That’s certainly what I do. In the geek world though, they are going a lot lower. I’ve seen 6 mentioned an

> Espresso is typically made with 9 bar of pressure. That’s certainly what I do. In the geek world though, they are going a lot lower. I’ve seen 6 mentioned and 7 or 8 is common. There is also the effect of the pre-infusion which is a lot lower. I haven’t explored this world, but there are plenty of die hard proponents of it.