weight draining

How do boxers weight drain before weigh ins? how many days in advance and what kind of diet do they have to do?

Food cut right back if not completely
MASSIVE water intake. Like 10 litres a day. Then cut it out completely about 3 days before the weigh-in
Saunas, treadmill with a sweat suit on, Epsom salt baths

Back in the day...It was dangerous diuretics that left you dangerously dehydrated....

Probably widespread now....

Bodybuilder mate of mine did Mandrake's water trick in the lead up to competition.

Said it basically tuned his body to Wee weeing like a racehorse every halfhour-hour so that when he cut fluids totally for 48-72 hours pre-comp he would carry on Wee weeing at the same rate but without replacing the fluids therefore totally draining his body of liquid.