The raw hops are sieved and cleaned of coarse impurities, then dried out to a humidity of approx. 8 – 10%. Then the raw hops are ground down into powder. The powder is pressed through a matrix – and the pellets are formed. In the next production step they are packed in aluminium compound foil with the addition of a CO2/N2-gas mixture. This is to make sure that no quality-damaging oxygen is in the foil. From 100 kg of raw hops approx. 90 kg pellets are made, hence the term „P90“.
With the manufacture of P45 the first production steps are identical with P90. The extracted powder is however then sieved over belts at a temperature of -35 °C. During this process the lupulin glands lose their stickiness. The lupulin separates from the spent hop cones. In this way an mechanical enrichment of the alpha acid content takes place. The alpha acid content can be adjusted according to the wishes of the customer by adding the hop cones later on e.g to 10,0 %. The pelletising and packing is the same as with the P90. Pellets weighing 45 kg can be extracted from approx. 100 kg raw hops – The pellets are called „P45“.