More rules about the pending experiments with regulated marijuana production are becoming clear, the NRC said on Wednesday.

In particular, officials are keen to make sure non-users do not take up the habit, so state-produced cannabis will be sold in ‘unattractive’ packaging, the paper said.

Growers may only use the Helvetica typeface on the packages and black ink. In addition the packet must be ‘free of all processing and branding which could make it more appealing,’ the paper said.

Nor may the packaging state what the likely effect of taking the drug is. The package must, however, also include a health warning.

The government said in August it will press ahead with trials of regulated marijuana production with the maximum 10 cities when the experiment starts in 2021.

The four-year experiment is part of the current government’s coalition agreement and was the express wish of the Liberal democratic party D66.

The experiment with regulated growing is supposed to remove the gray area between the sale of marijuana in council-licenced coffee shops and the illegal cultivation and supply.