Fragrance Allergens4 min read
Percent in the Fragrance vs Percent in the Product
The two percentages makers routinely mix up when disclosing fragrance allergens, and the multiplication step that connects them correctly.
April 28, 2026Read
Tagged percentages
Concentration Limits4 min read
Logging Ingredient Percentages So Your CNF Adds Up
A formula-sheet layout that keeps percentages summing to 100 and maps cleanly onto the concentration ranges Health Canada expects.
February 23, 2026Read
Concentration Limits4 min read
Do My Ingredient Percentages Need to Total 100
Why your formula's INCI percentages should sum to 100, how water q.s. handles rounding, and what actually goes wrong when they don't.
February 14, 2026Read
Concentration Limits3 min read
Three Percentage Mistakes That Delay a Cosmetic Filing
The three concentration errors that most often get a Canadian cosmetic notification flagged, and the fix for each one.
January 16, 2026Read