you should use a good quality D SALT powder of any of the
manufacturers of plating chemicals. all you need is:
b) D SALT powder (30/40 gms per litre)
c) D.M.Water(demineralised water)
heat the d.m. water upto 60c (which you already do), add D SALT
powder, stir till the powder desollves, add gpc, stir it
thoroughly, have a stainless steel (314 grade) anode, check rectifier
connections, apply 5/6 volts, and do a 8 to 10 second flesh.
you will get decent colour and shine.
Tanvi Arts (jewellery surface decorators)