What is gravimetric porosity?
The gravimetric method to determining pore volume and total volume relies on the ability to completely fill the pores of the sample with water and to obtain an accurate determination of volume.
What is primary and secondary porosity?
Primary porosity is the original porosity of the rock when it formed, and secondary porosity is the pore space created by subsequent processes such as fracturing.
What is Moldic porosity?
1. n. [Geology] A type of secondary porosity created through the dissolution of a preexisting constituent of a rock, such as a shell, rock fragment or grain. The pore space preserves the shape, or mold, of the dissolved material. See: pore, porosity, secondary porosity.
What is intercrystalline porosity?
Intercrystalline Porosity. This type of porosity is formed in the existing space among the dolomite crystals (Figure 3(a)) and their geological origin is from sabkha to open marine. This porosity is one of the best spaces for gas reserves in the gas field.
How do you find secondary porosity?
Secondary porosity is classically estimated from well logs as the difference of total density porosity minus total sonic porosity φf ≅ φd – φs. It is applicable to either carbonate rocks or clastic sandstones that may or may not contain clays.
What porosity is 4c hair?
4c hair is almost exclusively super low porosity Most 4c hair is super low porosity hair.
What does it mean when hair has high porosity?
Simply put, hair porosity refers to a strand of hair’s ability to absorb and retain moisture. Hair with high porosity can absorb the most moisture or water, but it’s unable to hold onto this moisture (which is not a good thing, since you want to keep your strands hydrated). On the other end of the spectrum is low porosity hair.
What to use on hair with low porosity?
Top off your low porosity hair care with the Wash Day Delight Conditioner with Rose Water. Hydrating rose water is lightweight enough to penetrate hair, while glycerin helps seal in the moisture without coating hair like a heavier oil can do.
What’s the difference between high porosity and low porosity?
There’s a distinct difference between low vs. high porosity hair. On the other end of the spectrum, if your cuticle is hard to open, a.k.a. you have low porosity, not a lot of moisture can get in at all. Tighter hair textures may have cuticles that overlap with each other, causing hair to have a low porosity.
How can you tell if your hair is porous?
Simply spritz some water onto your hair when it’s dry and take note of how fast your hair absorbs the moisture. If it soaks the water up right away, it’s indicative of having highly porous hair. If the water sits on top of your strands for longer, then your hair likely has a low porosity.