also known as: blotching
Uneven stain absorption caused by varying grain density within a board. Common in cherry, pine, birch, alder, and poplar. Prevented with pre-conditioner, dye, or gel stain.
Pre-conditioner first or the pine will blotch.
A thick, jelly-like stain that does not penetrate deeply. Wipes on and off cleanly, making it a reliable choice for blotch-prone woods like pine, cherry, and birch.
A thinned coat of finish (often 1-lb shellac) used to seal pores before staining or between finish coats. Reduces blotch and improves topcoat adhesion.