What is the best size micron rosin filter bag for pressing flower?

What is the best size micron rosin filter bag for pressing flower?

The recommended micron size for pressing flower rosin is 25u or 36u, with the ideal range lying between 25u and 90u.  These micron sizes effectively filter out trichrome heads, which are the most cannabinoid-rich part of the cannabis plant.  If you prioritize quality over yield, consider using a 72 micron bag.  However, for a balance between yield and quality, 115u to 120u bags are commonly preferred.  

Another source suggests using bags between 75 microns and 220 microns, with smaller sizes removing more contaminants like fats and waxes, while larger sizes tend to increase yield.  Ultimately, it depends on your personal preferences and desired outcome!