Conversion chart for LinePerINch to Micron

[Bubbleman]

This is from the book Hashish by Robert Connell Clark... definitly a must have for any bubblehead..


Hashish
Silk Screen Mesh Conversion Chart








--- LPI is lines per inch, which is the same as U.S. Mesh. In real world applications in the United States, silk screen may be sold simply as 155 mesh. This would be the same as calling it 155 lines per inch, or 155 U.S. Mesh.

--- A micron is equal to one twenty-five thousandth (1/25,000) of an inch, or one millionth (1/1,000,000) of a meter. A millimeter is equal to one thousandth (1/1,000) of a meter.

--- Screen mesh made out of multifilament polyester should not be used for sieving hashish because it is not as good and will not last as long as other types of mesh materials. You can tell multifilament polyester by a mesh rating with xx in it. Example 10xx, 12xx, 14xx, 30xx plus, etcetera.

--- When making hashish, you can vary the mesh size from about 65-125 microns (about 120-230 lines per inch). If the particles are larger than 125 microns, they are not very potent. As the particle size decreases down to 125 microns, the potency increases.

At about 125 microns, the powder is what most people would consider good hash. The potency increases as the particle size decreases down to 65 microns. At 65 microns, the trichome particles are at a point that most consider optimal. Particles smaller than 65 microns tend be broken or immature trichomes (medium


Peace
Bubble man

[Hieronymus Bosch]

Rob knows way too much. When was this book written? The 70's? Definitely a pioneer.

Thanks for posting this.

[Kif it Kunta]

good info Bubbleman

multi-filament meshes are not as good for dry sifting as mono-filament meshes as they will, over time, fray which will partially block the mesh opening affecting performance.

also note that this mesh chart, like all mesh comparison charts online, will give you only a general indication, due to the fact that not all mesh manufacturers use the same thickness threads for their meshes (which is another good reason to buy meshes that are sold that specify the micron size, as this will tell you the specific mesh hole or pore opening size..where as meshes sold with the LPI or how many lines per inch may have mesh openings that vary....one "100 mesh" with thick threads might have openings of 145 micron while another " 100 mesh" produced with thin threads might have larger mesh openings of 165 micron)

Happy Hashing!

[MajorLeagueBongRips]

I own hashish, but isn't there a new or revised edition? Anybody picked that up?

[Green Supreme]

Yes, Bubbleman got the cover shot I hear. Peace GS

[Kif it Kunta]

Hey BM....post a pic!

[Psuper]

So much good information in this forum.....had to share photos with everyone.






I wouldn't press any of this stuff normally, but below is a pic of a little bit hand-pressed prior to smoking:





Big up to all fellow forum members here.

[Razz]

oh nice...this is a sweet breakdown

[AlexParadis]

Clarke u mean