right. I’m not sure how they are proposing to sell the mycoboard, but it would appear that they have a custom press made for a shape they intend to replicate on an industrial scale. It isn’t really practical to cut chitin, as it tends to chew up metal.
the methods I was taught involved putting inoculated substrate (corn and hemp mulch, essentially) into PETE molds, where the substrate would be slowly (two to three weeks) colonized by the mycelium. Once the mycelium had colonized the mold, it could be baked (>200 F for several hours), in order to sterilize it. Note: baking it isn’t necessary, as the caps are not allergenic or toxic in any way. This is a design decision, based on the application.
After this, the mycelium component would be able to decompose, similarly to the way wooden components are able to decompose, when subjected to sufficiently damp conditions.
Notice, they are selling the 0.7 cu ft bags of inoculated substrate for $19.95, but i believe that they will negotiate with customers who intend to buy in bulk.
I believe that this material might provide an interesting alternative to CNC routed plywood components, assuming you wanted to make the same component several times over. I’m personally interested in using this material as an alternative to cement in the planter wall. If I ever make it a reality, I shall document.