Rosin in its broadest definition is a solventless extract made with only the use of heat and pressure. Rosin can be obtained by pressing essentially any material between two heated platens. During the rosin process, heat allows for the plants essential oils containing the terpenes we all love to become more viscous and pushed onto a paper where it can be collected.
The purpose of a rosin filter bag is to keep contamination out during the rosin process. There are various micron sizes specific for the type of material you’re processing. See the guide table by pressing here.
Yield is a ratio between the input material and the output material, and can vary depending on the quality of the material being pressed. Generally the yield of a rosin press machine is around 20%. This means for every 5g of material you put into the machine, you will end up with 1g of rosin.
Flower yields can range from 15%-30%+ for quality flower.
Pre-pressing is the process of pressing and densely compacting your material in a dry mould. This process isn’t necessary however it increases the yield of your press, hence reducing wastage. We highly recommend pre-pressing before heat pressing.
This is also depending on the material you’re pressing and we would advise to test various times to see the results. However, you can follow the information in the bullet points below for a rough guide.
The micron bag is dependant on the material being pressed. Generally the larger the size of the material in its natural form, then the larger micron you will need to generate a good quality rosin without sacrificing the yield produced.
25U* – Fine materials such as dry sift
100U* – Flower; results in best filtration and highest quality output with some reduction in yield
160U* – Flower; good balance between yield and quality
This depends on how much pressure you can apply and the surface area of the platens. We recommend to have 1-ton available for every 2.5 sq/cm of material surface area. This insures you always have enough pressure to extract your oil without the need for a repress.
We recommend pressing between 0.25g to 2.5g (per press).
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