Brush Making

Part of Pigments and Paint

Making paintbrushes from natural materials — selecting bristles, binding techniques, and building brushes for every application.

Why This Matters

A well-made brush is the most important tool a painter owns. The difference between a crude dauber and a properly constructed brush is the difference between slopping material on a surface and applying a controlled, even coating exactly where you want it. Good brushes make paint go further, produce better coverage, and allow precision work that is impossible with inferior tools.

In a rebuilding scenario, brushes are needed constantly — for painting buildings, waterproofing structures, applying preservatives to wood and metal, lettering signs, creating records and illustrations, and applying medicines and adhesives. A community that can produce reliable brushes gains capability that extends far beyond the paint workshop.

Brush making is also one of those skills that seems simple but has genuine depth. The choice of bristle material, the geometry of the bundle, the binding method, and the handle design all affect performance. Historical brush makers were specialists who trained for years. While basic functional brushes can be made in an hour, understanding the principles behind the craft allows you to build increasingly refined tools as your needs evolve.

Bristle Materials

Animal Hair

Animal hair is the traditional and generally superior choice for brush bristles. Different animals produce hair with different properties:

Hog bristle — the workhorse of brush making:

• Naturally split tips (“flagged” ends) that hold more paint and release it evenly
• Stiff enough to move thick paint
• Retains its shape when wet
• Best source: the back and shoulder of domestic pigs — hair is longest and stiffest here
• Preparation: wash thoroughly in hot soapy water, rinse, air dry, sort by length

Horse hair — versatile and widely available:

• Tail hair is medium-stiff, suitable for general-purpose brushes
• Mane hair is softer, good for finer work
• Body hair is too short and fine for most brush applications
• Preparation: wash, remove any kinked or damaged hairs, sort by length and stiffness

Goat hair — for soft, detail brushes:

• Very soft and flexible; produces smooth, streak-free finishes
• Holds less paint than stiffer bristles; requires more frequent loading
• Best from the belly and chin areas
• Ideal for watercolor, ink work, and fine finishing coats

Other animal sources:

Source	Characteristics	Best Use
Badger hair	Soft with natural taper	Blending, softening brush strokes
Ox ear hair	Springy, durable	Detail work, sign painting
Squirrel tail	Extremely soft, fine point	Watercolor, fine lettering
Cat whiskers	Very stiff, thick	Tiny detail brushes (use shed whiskers only)
Rabbit fur	Soft, fine	Small watercolor washes

Plant Fiber Alternatives

Where animal hair is unavailable or for rough applications:

Palm fiber:

1. Strip fibers from palm leaf sheaths or coconut husk
2. Soak in water for 24 hours to soften
3. Beat with a mallet to separate and thin the fibers
4. Dry, trim to uniform length, and bundle

Grass and reed:

1. Collect stiff grass stems (broom grass, marsh grass)
2. Dry thoroughly
3. Bundle and bind — produces a stiff brush suitable for whitewash and rough coatings

Yucca and agave:

1. Pound leaf tips to expose the fibers
2. Wash out the pulp, leaving clean fibers
3. These produce surprisingly fine, flexible bristles

Bark fiber:

1. Inner bark of cedar, linden, or elm can be separated into fine fibers
2. Soak, pound, and comb out to create soft, flexible bristle alternatives

Binding Techniques

The binding is the most critical part of brush construction. A poor binding means bristles fall out during use — ruining both the brush and whatever you are painting.

Thread Binding (Simplest)

1. Compact the bundle — hold your bristle bundle tightly and tap the butt ends on a flat surface to align them
2. Start the wrap — lay one end of strong thread (linen, sinew, or cotton) along the bristle bundle, with 5 cm extending past the butt end
3. Wrap tightly — begin wrapping the thread around the bundle approximately 1 cm from the butt end, pulling each wrap as tight as possible. Each successive wrap should sit directly adjacent to the previous one, covering 1-2 cm of the bundle.
4. Lock the wrap — after wrapping, thread the working end under the last several wraps using a loop of wire or a bent pin as a needle. Pull tight.
5. Seal — coat the entire binding with hide glue, pine pitch, or beeswax-resin mixture to waterproof and lock the threads in place

Quill Ferrule

Using a bird quill as a ferrule produces excellent small brushes:

1. Select a quill — large flight feathers from geese, turkeys, or swans provide the best quills
2. Prepare the quill — cut a section of the quill barrel, 2-4 cm long
3. Insert bristles — pack your bristle bundle into the quill section. The bundle should fit snugly.
4. Glue — drip hide glue or pitch into the quill around the bristle base
5. Attach handle — insert the butt end of the quill into a handle (a straight stick with a hole drilled or carved in one end) and glue in place

Metal Ferrule

The most durable binding, if metalworking is available:

1. Form the ferrule — wrap a strip of thin copper, brass, or tin plate into a cylinder that fits snugly around the bristle bundle. Overlap the edges by 5-10 mm.
2. Solder or crimp — solder the seam for the strongest ferrule, or crimp the overlapping edges tightly together
3. Insert bristles — pack the bristle bundle into the ferrule, butt-end first
4. Glue and crimp — fill the ferrule around the bristles with hot pitch or hide glue. While the glue is still soft, crimp the top edge of the ferrule inward slightly to grip the bristles.
5. Attach handle — slide the ferrule onto a handle that has been turned or carved to fit snugly inside it. Pin or glue in place.

Two-Part Ferrule

For the strongest connection, make the ferrule long enough to cover both the bristle base and 2-3 cm of the handle. This “two-part” grip prevents the brush head from twisting or separating from the handle during use.

Handle Construction

Wood Selection

Wood	Properties	Best For
Birch	Light, smooth, straight-grained	General purpose
Beech	Hard, heavy, smooth	Quality brushes, professional use
Willow	Light, flexible	Large whitewash brushes
Bamboo	Hollow, light, strong	Asian-style brushes, calligraphy
Bone	Smooth, durable, non-porous	Fine brushes, special tools

Shaping

1. Select a blank — a straight piece of wood, 15-25 cm long, 1-2 cm diameter for standard brushes (adjust for the intended use)
2. Shape — whittle or turn to a comfortable grip. Round cross-sections roll off tables; consider a flat or octagonal cross-section.
3. Socket — drill or carve a socket at one end to receive the ferrule or bristle bundle. The socket should be 1-2 cm deep and just slightly smaller than the ferrule/bundle for a tight fit.
4. Finish — sand smooth and apply a light coat of drying oil or beeswax to seal the wood against moisture

Handle Length Guidelines

Application	Handle Length	Why
Detail/lettering	12-15 cm	Close control
General painting	18-22 cm	Comfortable grip at arm’s reach
Wall painting	25-35 cm	Extended reach
Ceiling/overhead	40-60 cm or pole-mounted	Reach without scaffolding
Floor/deck coating	60-90 cm (broom-style)	Apply standing up

Specialty Brush Types

Calligraphy Brush (Asian Style)

1. Select the finest goat or rabbit hair available
2. Arrange a small bundle (5-8 mm diameter) with hairs perfectly aligned at the tips
3. Wrap the base with silk thread or fine cord
4. Insert into a bamboo handle (a hollow section with the bristle bundle glued into one end)
5. The result should form a perfect point when wet — test by dipping in water and drawing a line. If it does not come to a point, rearrange the hair bundle.

Stippling Brush

For applying paint through stencils or creating textured surfaces:

1. Use stiff hog bristle, cut to uniform 2-3 cm length
2. Pack into a short, wide ferrule (2-4 cm diameter)
3. Attach to a short handle (10-12 cm)
4. The working end should be perfectly flat — trim with sharp scissors while pressing the bristles against a flat surface
5. Use with a dabbing (up-and-down) motion, never a sweeping stroke

Fan Brush

For blending, softening edges, and creating texture effects:

1. Spread a thin layer of bristles (goat or badger) into a flat fan shape, 3-5 cm wide and only a few millimeters thick
2. Clamp between two flat metal strips crimped at one end to form the ferrule
3. Attach to a standard handle
4. The bristles should spread in a gentle arc when pressed against a surface

Mop Brush

For applying large quantities of wash, stain, or whitewash quickly:

1. Bundle a large quantity of soft bristles (goat, horse, or soft plant fiber) — 4-8 cm diameter
2. Bind with cord or a large ferrule
3. Attach to a long handle
4. The bristle bundle should be loose and floppy, holding maximum liquid

Quality Testing

Before putting a new brush into service, test it:

1. Shape test — wet the bristles and shake off excess water. The brush should form a clean shape (pointed for rounds, straight edge for flats). If bristles splay randomly, the bundle is poorly arranged.
2. Spring test — press the bristles against a flat surface and release. They should spring back to their original shape immediately. Limp bristles indicate poor material or over-soaking.
3. Shedding test — stroke the brush firmly across a dry surface 20-30 times. If more than 2-3 bristles come out, the binding is insufficient.
4. Loading test — dip in water (or thin paint) and apply to a surface. The brush should hold enough liquid for a stroke of 10-20 cm without running dry. If it does not hold paint, the bristle bundle may be too loose.
5. Line test — draw a straight line. The brush should produce an even line without skipping, blobbing, or wandering due to stray bristles.

Break-In Period

New brushes often perform better after a few hours of use. The bristles settle into their final positions, any loose ones shed, and the binding tightens as it absorbs and releases moisture. Do not judge a brush’s final quality on the first use alone.

Caring for Finished Brushes

Daily Care

1. Clean immediately after each use — never let paint dry in a brush
2. For water-based paints: rinse in clean water, reshape, hang to dry bristle-down
3. For oil-based paints: clean first in turpentine or cooking oil, then wash with soap and water
4. Never soak a brush standing on its bristles — this permanently bends them

Long-Term Storage

1. Ensure brush is completely clean and dry
2. Wrap the bristle end in a paper or cloth sleeve to maintain shape
3. Store in a dry, pest-free location
4. For animal hair brushes, include a cedar chip or lavender sprig to deter moths
5. Check stored brushes periodically for insect damage or mold

Repair

Common repairs that extend brush life:

• Re-binding — if the ferrule loosens, remove it, clean off old glue, repack bristles, and re-glue with fresh pitch or hide glue
• Trimming — stray or damaged bristles can be carefully trimmed with sharp scissors without dismantling the brush
• Handle replacement — if the handle cracks or breaks, the ferrule and bristle assembly can be transferred to a new handle