I'm looking for the correct translation of the Russian term "перфорированность" and find the "perforability" but don't know, is it correct?

From the physical point of view "perforability" means the relative area of a surface occupied by pores.

This term can be used in (scientific) papers.

For example, the sentense

To calculate the relative area of perforations (pores) on the surface of crystal slices, we use the following method ...

can be changed to a new one

To calculate the perforability of crystal slices, we use the following method ...

There is a close term "porosity" that means the relative volume of a solid occupied by pores. But I need a term for the surface area.

Can perforability be used for this?

  • The question may be closed because it is about Russian translation, But if you give an example sentence of the use of the word, we may be able to help you.
    – Anton
    Dec 23, 2021 at 10:07
  • Added an example. Is it enough?
    – Ivan Z
    Dec 23, 2021 at 10:21
  • Probably density is a useful term here.
    – user 66974
    Dec 23, 2021 at 11:15
  • Pores density? May be, but I'd like to underline perforations.
    – Ivan Z
    Dec 23, 2021 at 11:33
  • 4
    If perforability is a word, which I doubt, it would mean the ability to be perforated, not the area that is perforated. Dec 23, 2021 at 15:55

3 Answers 3


The OP requests a term for "the relative area of a surface occupied by pores."

porosity / surface porosity

The definition of porosity is

The ratio of the volume of interstices of a material to the volume of its mass m-w

Porosity characterizes the volumetric aspect of the pore system. Jürgen Schön; Physical Properties of Rocks

However, porosity appears to be used for surfaces as well.

A modified theory of the later, ..., applies to non-porous surfaces. Standard curves are more useful, especially if one is interested in porosity, although most depend upon calibration by some other interpretation, usually the BET. (p.56)

Surface Area and Porosity Determinations by Physiorption [graph caption] (p.130)

James B. Condon; Surface Area and Porosity Determinations by Physisorption: Measurements and Theory (2006)

ONC® is a process that takes advantage of surface porosity observed in most compound layers after nitriding. It is a simple concept but the process is not easy in that the amount of porosity generated during the nitriding stage must be properly controlled. ASM, and N. Dahotre; Heat Treating and Surface Engineering (2003)

The original Cassie equation did not include a term for porosity, but it was expanded to include surface porosity... Felix N. Büchi et al.; Polymer Electrolyte Fuel Cell Durability (2009)

In general, the higher the porosity, the higher the permeation flux. Depending on the fabricate technique, its pore distribution can be inhomogeneous, resulting in a surface porosity that differs from the bulk porosity. J. Hu et al.; Handbook of Fibrous Materials, Vol. 1

  • I choose this answer as best, but I also like the @PhilSweet answer. Unfortunately it is impossible to choose two answers as best.
    – Ivan Z
    Jan 1, 2022 at 16:10
  • And what do you imagine, when listen artificial word "perforosity"?
    – Ivan Z
    Jan 1, 2022 at 16:12
  • To be perfectly honest, seeing perforosity, I would think that it's a mistake and the writer didn't know porosity, or that the writer means something different. :-) Perforosity calls to mind the verb perforate: to make holes, so perhaps "the ease or difficulty of making holes/be punctured"??
    – DjinTonic
    Jan 1, 2022 at 16:15

I'm assuming this is a 2D or pseudo 2D situation, where the areas in question are projections on a plane. That's pretty much the only way that a pore has an area that is different from the solid surface area.

Relative measurements are rendered as coefficients in technical English, or sometimes as specific X. There doesn't appear to be an established single term for this. And there are several seemingly appropriate terms that are already claimed for different measurements and that have test standards and definitions.

After surveying some technical documents on filters, I suggest "relative pore surface coverage" as used in the abstract which follows - https://cyberleninka.org/article/n/1416663

  • Also a term "relative pore covered area" is used. Thank you.
    – Ivan Z
    Dec 25, 2021 at 21:24
  • I like this answer and will be use proposed phrase as an alternative for "porosity", but I select the porosity as the best answer.
    – Ivan Z
    Jan 1, 2022 at 16:08

From the context and your helpful example, I suggest that permeability, which is a term commonly understood in physics, engineering and geology, might satisfy your need.

Merriam Webster


the quality or state of being permeable

Merriam Webster


capable of being permeated : Penetrable especially : having pores or openings that permit liquids or gases to pass through

// permeable membrane"

The concept applies to three-dimensional structures but, as the Merriam Webster example of membrane suggests, it also applies to a thin structure or surface such as your thin crystal slices.

  • Britannica says that "The standard unit of permeability is the darcy, equivalent to the passage of one cubic centimetre of fluid (having a viscosity of one centipoise) per second through a sample one square centimetre in cross-sectional area under a pressure of one atmosphere per centimetre of thickness". So, the permiability is not a measure of a surface of perforations. To measure permiability it is necessary to take into account too many parameters.
    – Ivan Z
    Dec 23, 2021 at 12:59
  • Moreover "permeability" has a Russian equivalent "проницаемость" that is not equal to "перфорированность".
    – Ivan Z
    Dec 23, 2021 at 13:00
  • @IvanZ Permeability is the concept. The Britannica quote refers to how to measure the concept. As regards the second comment about cross-translation, there are many words that do not translate exactly or uniquely from one language to another and back, and to argue that they do easily leads to error. But this site is not about translation, it is about English usage.
    – Anton
    Dec 23, 2021 at 13:20
  • OK, lets consider my term "perforability". As a native English speaker, what do you imagine when you listen word "perforability"? Is it syntactically correct term?
    – Ivan Z
    Dec 23, 2021 at 13:25
  • 1
    @IvanZ - The problem I have with perforability is that it sounds like a measure of how easily something can be perforated.
    – Jim
    Dec 23, 2021 at 13:47

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.