... plating, Gold imitation plating and Zn passivation. JC-2050 is a water-based solution, when immersing or spraying, ... of working solution The solid content of JC-2050 is 50% , a working solution is usually diluted by adding ... solution should be tested after a certain period, fill in the required JC-2050 basic solution to ... content is too low, add in required JC-2050 basic solution and re-immerse the work ...