Van Leeuwen is working to further scale the process to make larger quantities.

“We need to solve some engineering and science problems, but the goal is to get to one metric ton per day of graphene in a year and a half.  Now we are at grams per day,” he says.

So their goal is a metric ton per day. In round numbers, that's 350 metric tons per year. Wasn't ZEN forcasting 35,000 tons per year for 40 years of proven, easily converted, precurser material (Albany Pure Graphite)?

I can only image what engineering and science problems Van Leeuwen has to deal with.