geopiet Apr 5, 2023:

ja się nie znam, ale takie coś wygrzebałem .. Pitch is the name of a large number of highly viscous liquids which appear solid. Pitch may be made from petroleum or plant sources. Petroleum derived pitch is also known as bitumen whereas plant derived pitch is known as resin. Pitch derived from plant resin however is known as rosin.Tar and pitch are often used interchangeably. However, pitch is considered to be more solid whilst tar is considered to be more liquid.

- https://www.uspto.gov/web/patents/classification/cpc/pdf/def...

Paweł Janiszewski (asker) Apr 5, 2023:

Świetne znalezisko, dziękuję!

Aczkolwiek utwierdza mnie to w przekonaniu, że pitch nie mogę nazwać osadem żywicznym, bo może zawierać substancje różnego rodzaju....

geopiet Apr 5, 2023:

z tego samego żródła Components of pitch can also include organic resinous and tarry materials made up of the above ingredients, as well as complex organic materials derived from wood processing.

geopiet Apr 5, 2023:

Pitch is a major problem in pulp and papermaking Problems caused by pitch build-up on pulp and papermaking machinery and formation of pitch globules in the final paper, thereby requiring repulping and recycle, cost the pulp and paper industry considerable money both in terms of dollars and in terms of time and lost production. Pitch is considered to be a resin based deposit of varying natures coming from widely varying compositions originating in extractive fractions of wood. These extractive fractions are normally complex mixtures of substances, sometimes soluble in cold water, but most likely soluble in alcohol, benzene, ether, and acetone and making up about 3 to about 10 percent of the weight of wood. These extractive fractions of wood containing the pitch normally contains low molecular weight cabohydrates, turpenes, aromatic and aliphatic acids, fatty alcohols, tannins, color bodies and other colored substances, resins and resin esters, proteins, phlobaphenes, lignins, alkaloids, and some soluble lignins.

- https://patents.justia.com/patent/5230

Paweł Janiszewski (asker) Apr 5, 2023:

W wersji roboczej miałem: "nachylone nagromadzenie", ale ostatecznie stwierdzam, że chyba nie o to chodzi.

Bardziej skłaniam się terminowi "smoliste nagromadzenie".