Okay, definition of foam.

1. When you finish the foam, the amount of foam should not be higher than 20% or 30% of the original milk.

two。 When you finish foaming, you should use a bubble of uneven size.

3. When you finish the foam, please repeat the left-handed and right-handed cups. At this time, the foam on the wall of the cup should slip like cream.

And no bubble in the wall of the flower cup.

4. When you pour the foam, the first bubble and the last bubble must look like cream.

It is generally slippery.

5. The degree of milk foam should be 55C ~ 60C.