The company, Northland Milk NZ, would operate a different model to dairy giant Fonterra.
While Fonterra sold its milk at auction and paid farmers according to the fluctuating global milk powder price, Northland Milk would pay farmers a set price and sell its finished products to two companies which each had 3000 retail outlets in China.
The contract would protect farmers during down times, Mr Brown said.
"When the milk price is low we'll be paying more. When it's high they'll have to stick with us anyway, but they won't be losing. We know we'll do better than the crap prices farmers are getting now."
The company would start approaching farmers, initially in a 20km radius, once the project was certain to go ahead.
"We're not coming to local farmers until we've committed to start building and it's absolutely risk free," Mr Brown said.
Twenty people would be employed in the factory with a similar number of outside jobs created, for example for truck drivers.
The milk would be packaged on site in Tetra Pak cartons.
Mr Brown, currently the largest shareholder, said he was still raising the roughly $40 million needed, but he had enough to get started on working drawings.
The companies being supplied in China would also buy shares in the factory.
Farmers could buy shares if they wanted but, unlike Fonterra, that was not a requirement.
Other investors included a Kiwi ex-pat in Hong Kong.
The milk would be bought from local farmers with no overseas ownership of land involved.
Northland had been chosen for the venture because its climate made it possible to get a year-round supply of milk, and Kerikeri because it already had a food industry with the expertise, refrigeration firms, laboratories and other infrastructure needed to support a milk plant.
It would be built on a 5ha property next to a new Top Energy substation and a Kerikeri Irrigation Company dam, ensuring a good supply of power and water.
Up to a dozen refrigerated containers a day will be trucked to the port at Auckland.
Originally the dairy company had wanted to truck the containers to Moerewa then load them on to a train, but low tunnels and KiwiRail's lack of low-bed wagons mean they won't fit.
Northland Milk's two other directors are Neil Domigan of Manukau and David Mace of Arrowtown.