Brush, Painting

Quick Answer: The Brush, Painting is a fine artist’s-type brush with soft bristles held in a ferrule on a handle, used in laboratories for delicate handling tasks as well as painting. A painting brush can pick up and move small, fragile objects, such as fruit flies, pollen or thin tissue sections, without crushing them.

A Soft Tool for Delicate Jobs

Forceps grip too hard for many small biological specimens. In genetics practicals, anaesthetised fruit flies are sorted on a white tile or card by gently pushing them with a soft brush, which moves them without damaging wings or legs. In histology, thin sections floating on water are guided and lifted with a moistened brush tip. Plant biologists hand-pollinate flowers by transferring pollen from anthers to stigma with a small brush, and entomology students use one to lift small insects and larvae into collecting tubes.

Painting is the other side of the job. A brush applies a thin coat of clear nail varnish to a leaf surface for the stomata impression method, spreads glue on labels and mounting cards, applies varnish to models and specimen boards, and touches up paint on apparatus. The listing does not give brush sizes, bristle type or tip shape; a fine, pointed round tip suits specimen handling, while a flat brush covers larger areas, so specify the tasks when ordering.

Laboratory and Classroom Uses

• Sorting anaesthetised Drosophila by sex and phenotype in genetics practicals.
• Hand-pollinating flowers in plant breeding and fast-growing plant investigations.
• Painting clear nail varnish on leaves to make stomatal impressions for microscopy.
• Guiding and lifting thin sections or small specimens onto slides.
• Applying paint, varnish or glue to models, charts and specimen labels.

Specifications

Care & Handling

• Keep brushes used for specimens separate from those used for paint, glue or varnish.
• Clean paint and varnish off promptly with the solvent suited to the material, then wash in soapy water and reshape the tip.
• Dry brushes flat or tip up; standing a wet brush on its bristles bends them permanently.
• For pollination work, dip the brush in alcohol and let it dry between plants so pollen is not carried across.

Why Choose LabEquip

Painting brushes are ordered by biology departments for genetics, plant and histology practicals, and by schools for model and display work. LabEquip lists them in the General Lab Products range; say which tasks the brushes are for on the contact page.

Frequently Asked Questions

How is a painting brush used to handle fruit flies?

Once the flies are anaesthetised and tipped onto a white tile or card, a soft brush pushes them gently into groups for counting and sorting. Unlike forceps, it does not damage wings or legs, so the flies can be returned to culture.

Can the brush be used for hand-pollination?

Yes. Touch the brush to ripe anthers to pick up pollen, then brush it onto the stigma of the receiving flower. Clean the brush between different parent plants so pollen is not mixed.

How do I make a leaf stomata impression with the brush?

Paint a thin layer of clear nail varnish on the leaf surface and let it dry. Press clear adhesive tape onto it, peel it off and stick it to a microscope slide, then examine the impression under a microscope.

Which tip shape should I choose?

A fine, pointed round tip gives control for small specimens and pollen. A flat brush spreads glue, varnish or paint evenly over larger areas. Many departments keep a few of each.

How should brushes be cleaned after varnish or paint?

Remove water-based paint with water and soap. Use the solvent recommended for the varnish or oil paint, then wash in soapy water, rinse and reshape the tip before drying.

Why do the bristles splay after use?

Bristles bend if the brush is left standing in liquid or dried on its tip. Rinse brushes promptly, reshape the tip with your fingers and dry them lying flat or with the tip upward.

Last Updated: September 2026