Gentle and Sweet espresso profile - good for light roast beans

The Gentle and Sweet espresso profile, commonly used with machines like the Decent Espresso DE1, 

is characterized by a lower maximum pressure (around 6 bars) compared to the standard profile (around 9 bars), resulting in a sweeter and less acidic taste. 

This profile is known for producing a smooth, low-acidity shot that works well both on its own and with milk. 

Here's a more detailed explanation:

18g in, 33 out.

Total time : 20 secs .... quick !!

There is no long pre-infusion.

You don't need a fine espresso grind.... you can go coarser than your usual espresso grind.

Use a large flat burr grinder if possible  with a burr that produces less fines. 

Clarity is the name of the game here.

(This is the opposite situation to dark roasts which like more fines). 

If the grinder you use has a variable speed use the slowest speed possible.

Lower Pressure - this is the key:

The Gentle and Sweet profile utilizes a lower maximum pressure (6 bars) than standard espresso profiles (8-9 bars). 

Make sure the pressure doesn't drop below 6 bar since this minimum level is needed to create crema.

Lower pressure = less chance of channeling.

This lower pressure also contributes to a sweeter and less acidic espresso. 

Like the default profile, it is versatile and can be used with various coffee beans and roasts but is good for light roasts esp. Light roasted coffees resist channeling less well.

(as a side note, I sometimes use a lower pressure in my lever machines to reduce channeling. This contributes to sweetness).

Smoothness:

The lower pressure and slower extraction can lead to a smoother mouthfeel and a more balanced flavor profile. 

Pre-infusion:

It sometimes involves a short pre-infusion phase at a lower pressure, which can help with even saturation and extraction. 

Ideal for Beginners:

It can be a good starting point for those new to espresso or for dialing in new beans, as it's more forgiving and easier to work with. 

Milk Drinks:

The Gentle and Sweet profile is particularly well-suited for milk-based drinks like lattes and cappuccinos due to its balanced and mellow flavor.