When the hemp straw is retted and the glue layer between the fibre and the core material is sufficiently dissolved, the straw is pressed into bales with a moisture content of below 18%. Until the time of further processing (ยง6.1), the bales of hemp straw are stored dry, usually at the processor's premises.
Silage for pulp and paper
For the purpose of application in pulp and paper, chopped hemp straw can also be ensiled after field retting and drying. From the silage, the hemp can then be transported to the pulp mill throughout the year. This enables decentralised storage at the farmer's premises.
For use in paper, it is useful to remove the leaves and flowers/seeds as much as possible during harvesting as these negatively affect paper quality.[1],[2] Too much acidification during ensiling may lead to degradation of the cellulose, and therefore loss of fibre quality.