Eight tests
A single patch, read for skin irritation
Repeated patches, a rest, then a challenge patch, read for irritation and sensitization
Use under a dermatologist's supervision, for a dermatologist tested claim
Toxic metals in pigments, color cosmetics and raw materials
p-Phenylenediamine in permanent hair dye
Hydrogen peroxide strength in developers and bleach
Ammonia in permanent color and lighteners
Bacteria, yeast and mold counts
3–8business days
Our lab in Lowell
