"How is the load in kg or lb in washing/laundry machines measured"?
Answers:
The laundry is weighed dry. Most household machiines are 35# capacity. Some laundry mats can go up to 80#. Large industrial machines go up to 400-500#.
Other answers:
Weigh the clothes dry first. I think Dry Cleaners use a scale like the produce scales in grocery stores.
Weigh the clothes dry first. I think Dry Cleaners use a scale like the produce scales in grocery stores.