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| Red Lead | Litharge | Frits |
| Akzo | BASF | Colorobbia |
| Renner - DuPont | Philips | Ferro Enamel |
| Glasurit | Johnson Matthey | Portobello |
| Coral | Cerdec-Degussa | Iasa |
| Getoflex | Colorobbia | Gyotoku |
| Yuasa | Ferro Enamel | Villa Gres |
| Saft Nife | Esmalglass | Santa Gertrudes |
| Henkel | Batistela | |
