We have produced some conical corks in agglomerated cork to a client – we can produce them to more or less any dimensions and it is an interesting process how they are made. The cork industry is fascinating in that nothing goes to waste – natural corks are punched out of the cork bark that is stripped off the cork oak trees and the resulting off-cuts are ground up to make cork granules which can be used in a variety of ways.
In this case the cork granules are made into cork board in various thickness and then like the natural corks, the conical corks are punched out of the agglomerated cork board. Then the resulting off cuts are sent to be reground to make cork granules again.
Agglomerated wine corks are made in a different way however – in this case the granules are mixed up with a food grade binder and the corks are extruded into rods (generally 23mm diameter) which are then cut to length to make corks (for example 44mm).