When making udon, we use plenty of dusting flour.
At the end, apply powder to bring out the shine.
talcum powder
Standard kanji spelling.
Variant spelling without okurigana.
Search-only form; not a standard spelling.
Compound of 打ち (uchi, 'striking' or 'sprinkling') + 粉 (ko, 'powder'). The term refers to powder that is sprinkled or dusted onto something.