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Graywolf

CONVERTING MESH TO MICRON

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Discussing the hole size between the wires or threads can be confusing because often only the mesh or thread count is given. In fact, with only that information, it not possible to determine pore size, because that number depends heavily on the diameter of the threads or wires used.

 

Attached is chart of average pore sizes by Mesh, which is the same as Thread Count. If you want actual pore size, you may calculate it yourself as follows:

 

(1) minus (Thread or Mesh X thread diameter) will give you the total amount of open space per unit.

 

There are one less openings than threads or meshes, so dividing the total amount of open space by (thread or mesh count minus 1) will give you the size of the individual openings.

 

A micron is one millionth (10-6) of a meter. To convert your answer from threads per inch, divide the answer in inches by .00003937 to get microns.

 

IE: 200 mesh or 200 thread count by the chart below, depends on the thread or wire size to be .0021".

 

1 - (200 X .0021" thread diameter) = .5771" Open space

 

Open space divided by (200 -1) = 74 micron Pore size

 

Pore size in inches divided by .00003937" equals microns.

 

 

U.S. MESH.....INCHES..........MICRONS......MILLIMETERS

............3..........0.2650..............6730...............6.730

............4..........0.1870..............4760...............4.760

............5..........0.1570..............4000...............4.000

............6..........0.1320..............3360...............3.360

. .........7..........0.1110..............2830................2.830

............8..........0.0937..............2380...............2.380

............10.........0.0787..............2000...............2.000

............12.........0.0661..............1680...............1.680

............14.........0.0555..............1410...............1.410

............16........0.0469..............1190................1.190

............18.........0.0394..............1000...............1.000

............20........0.0331...............841................0.841

............25.........0.0280..............707................0.707

............30.........0.0232..............595................0.595

............35.........0.0197..............500................0.500

............40.........0.0165.............400.................0.400

............45.........0.0138..............354................0.354

............50.........0.0117..............297................0.297

............60.........0.0098..............250................0.250

............70.........0.0083..............210................0.210

............80.........0.0070..............177................0.177

............100........0.0059..............149................0.149

............120.........0.0049............125................0.125

............140.........0.0041.............105................0.105

............170.........0.0035..............88................0.088

............200.........0.0029..............74................0.074

............230.........0.0024..............63................0.063

............270.........0.0021..............53................0.053

............325.........0.0017..............44................0.044

............400.........0.0015..............37................0.037


A Posse ad Esse. From Possibility to realization.

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Sieve size depends on what process you are using and what you are going to use it for. Dry sieve and bubble are done a little differently and serious connoisseurs often do multiple sieves to get just the mature heads.

 

Mature trichome heads vary in size by strain, but generally fall within the 95 to 75 micron range.

 

For bubble, the working bag might be 250/220 microns, to separate the bulk of the plant material from the trichomes that have been broken off by the cold and agitation.

 

Typically dry sieve folks do a first sieve around 160 microns to separate the mature heads with stems still attached and 160 microns is often used in bubble bags for the same purpose.

 

Folks looking for full bubble quality might filter or sieve again at around 110/95 microns and then again around 73 microns for the full bubble heads.

 

Often a 50/25 micron filter is then used to catch immature heads.

 

Skunk pharm's vibratory Grinning Reaper dry siever uses a 130 micron stainless screen, as does my own personal harvest box.

 

Having boeotian tastes, I like the taste and flavor of that kif just as it is, without further sieving.


A Posse ad Esse. From Possibility to realization.

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I will bring the Grinning Reaper to the gathering for anyone who wants to run product. It works best if the product is frozen first.

 

A 220 working bag and a 160 filtration bag will give you smokable product that is tasty and efficient if you don't beat up the product too severely in the working bag.

 

Depending on how much you beat up the plant mateial, it will contain small plant fragments of varying size that will add to both the flavor and the harshness of the smoke.


A Posse ad Esse. From Possibility to realization.

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