Bristle hair
Bristle hair ( lat. Saetae , in the newer nomenclature Setae ) is a special form of hair . It is stiff outer hair ( fur hair ) with a split tip. From a chemical point of view, bristle hairs are natural substances with a high protein content , more precisely keratin content .
Bristle hairs form the coat in pigs . But all other mammals also have bristles in the form of protective hairs at the head openings. According to the localization, these bristle hairs are divided into:
- Eyelashes (cilia)
- Eyebrow hairs (Supercilia) of the primates
- Ear canal hair (tragi)
- Nasal hairs (vibrissae)
use
The bristle hair of the pigs is used in brushes and paint brushes . For this purpose, the bristle dresser combed the raw pig bristles to separate the wool, sorted, cleaned with alum water or soap and bleached in the sun or with sulphurous acid , sometimes also dyed. Then several bundles of bristles are attached to the brush or brush body.
The bristle hairs of pigs are conical in shape, so they have a larger diameter at the bristle root than at the tip. The tip of the bristle (also called “flag”) is split into three to four fine fibers - comparable to split ends , only the partial fibers of the pig's bristles keep their shape. This allows a lot of paint to be absorbed and the paint application is more even. Together, the tips create a soft surface, so that the painted surfaces or layers of paint that have already been applied are not scratched. When the bristle tip wears out, the process of splitting continues with the bristle hair now becoming shorter. As a result, the good properties are retained even with continued use.
Individual evidence
- ↑ Pig bristles . In: Meyers Konversations-Lexikon . 4th edition. Volume 14, Verlag des Bibliographisches Institut, Leipzig / Vienna 1885–1892, p. 746.
- ↑ Brief material science paintbrushes and brushes on PEKA.ch
- ↑ A little brush knowledge artist and fine hair brushes on andis-artgalerie.info