Panjaluk industri hilir wis wiwit pulih bubar.Rega bahan mentah meta-phenylenediamine, kobalt klorida, lan kobalt sulfat wis mundhak.

Akeh pabrikan pewarna wis nyetel regane.Nalika panjaluk m-phenylenediamine mundhak, rega pewarna disperse lan resorcinol bakal mundhak.