STEPS FOR MAKING SPARE DRY FILTERS

The making of a dry filter involves four simple steps.

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Step 1. Cut wood.

Cut a piece of wood with a minimum thickness of around 8mm.

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Step 2. Soaking in hot water (60°C) for 1 hour.

Sapwood has a self-blocking function. 

To mitigate this self-blocking, we soak the wood for 1 hour at 60°C.

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Step 3. Soaking in alcohol overnight.

Before drying, to improve shelf-life, we soak the cut filters in food-grade alcohol (isopropanol, ethanol, etc.).

This preserves the structural integrity of membranes and provides a shelf-life of at least two years.

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​​Step 4. Drying.
Filters can be dried in an oven at 40°C, or just be air-dried .

Before packaging, the sapwood filters shouls be completely dry.

To enhance the shelf-life and keep the filters in a dry state, silica sachets can be used.