Visual Identification of Filters
The photos below illustrate the various types of filters that can be incorporated into Unicorn bags:
Unicorn Types B and BN Filters
Our Type B filter has a high gas exchange characteristics, with over 90% area has pores and pore size is higher than the A filter which is 5 microns. Due to this characteristic B filtered bags can be sealed before autoclaving. Most other bags either the filters allow competing fungi to go through or too small pores that will pop during autoclaving.
Unicorn Type T Filter – 0.2 micron pore size
Our T filter has 0.2 micron pores and 90% efficient and is designed for spawn producing.
Unicorn Type 14 and 14A Filters
Our Type A filter is designed for shiitake cultivation. It has a nominal 0.5 micron pore size meaning 80% at 0.5 micron and some over and some under. It is also made to have only 50% approximately area for breathing. This allows shiitake mycelium to grow in higher CO2 environment.