| Van Gieson trichrome | 08033976212643 | DDK ITALIA S.r.l. | Class A | |
| Verhoeff Van Gieson for elastic fibers | 08033976212957 | DDK ITALIA S.r.l. | Class A | |
| Von Kossa | 08033976212667 | DDK ITALIA S.r.l. | Class A | |
| Warthin Starry | 08033976212674 | DDK ITALIA S.r.l. | Class A | |
| Weiger’s Van Gieson fast method | 08033976212711 | DDK ITALIA S.r.l. | Class A | |
| Weigert fast method | 08033976212698 | DDK ITALIA S.r.l. | Class A | |
| Weigert’s long method | 08033976212681 | DDK ITALIA S.r.l. | Class A | |
| Weigert’s Van Gieson long method | 08033976212704 | DDK ITALIA S.r.l. | Class A | |
| Ziehl-Neelsen | 08033976212728 | DDK ITALIA S.r.l. | Class A | |
| Ziehl-Neelsen Fite | 08033976212735 | DDK ITALIA S.r.l. | Class A | |