- 38 dynes Quick test pencils, quick drying (used to distinguish the treated side from the untreated side of a film)
- Pencils 38, 40, 42, 44 dynes ECO (precise measurement)
Minimum order 10 pencils, possible mixing for Quick test 38 dynes and 40, 42, 44 dynes ECO
Quick test hair pencils
Quick tests are pencils containing quick-drying ink at 38 dynes, of lower precision than ECO ink.