Catalyst is used for when the ultimate bonding is needed...acts like a hardener in glue's

Nylobag NB can be used as a simple one-pack system but for more demanding requirements NB386 NB Catalyst is recommended for mixing into the base colours. NB Catalyst improves adhesion and fastness properties and decreases the possibility of adhesion deterioration over a period of time. Catalysed inks have a pot life of approximately 8 hours. Estimate the amount of ink required for a day’s work and thoroughly mix the ink base and catalyst in the following ratio:

Nylobag NB Ink 90 parts by weight > NB Catalyst 10 parts by weight

Catalysed ink left over at the end of the printing run should be discarded.