Every brush obeys one rule: natural bristle for oil, alkyd, varnish, and stain; synthetic for latex and water-based — natural fiber absorbs water, softens, and flares, while synthetics keep their shape.
Richard doesn't state the ARTIST fill for any of these brushes, the pack included, so confirm the material before matching a medium, and keep an unknown synthetic away from lacquer and strong solvents.
Touch-ups usually match the paint already on the surface — often water-based on modern work — but verify rather than assume. (ARTIST filament unverified; no natural/synthetic claim until packet upgrade.)
Not a documented size set — because the three widths aren't published, don't rely on it to contain a specific width you need; if you need a known size, buy that single brush (80012 = 1/4″, 80013 = 3/8″, 80014 = 1/2″, 80015 = 5/8″, 80016 = 3/4″).
Not a coverage kit — every brush in it is a detail width, not a surface brush.
Whichever widths the pack contains, the discipline is the same across artist brushes
thin the load — touch-ups fail from too much paint, not too little; feather the perimeter of a repair into the surrounding finish rather than stopping at a hard edge; match sheen as well as color, since flat, eggshell, and semi-gloss dry to different reflectances; and clean each brush promptly in the correct solvent and reshape the tip, because a splayed small brush loses the control that makes it worth keeping. The single-width guides (80012–80016) carry the same fundamentals per size.
Asked before buying
BUYER QUESTIONS, ANSWERED BEFORE YOU ORDER
What three sizes are in the pack?
Richard's catalog data doesn't publish the contents — only that it's a 3-pack of artist brushes. If you need a specific width, buy the single (80012–80016).
Should I buy the pack or singles?
The pack to keep a range of touch-up widths on hand for unknown future repairs; singles for a known job at a known width.
Latex or oil?
Whichever the fill matches — and the fill isn't published, so confirm it and keep an unknown synthetic out of lacquer.
Is this for painting trim?
No — it's a detail/repair assortment. For finished small-element trim, use the trim brushes.
What isn't published?
The three widths, the filament, flat-vs-round form, bristle length, and ferrule — none are in Richard's data, so none are claimed here.
