Solubility of zinc in water

Hi,

Im doing research on the solubility of zinc in water with 120 gram/liter NaOH. So far i desolved till a concentration of 20 gr/l zinc and i was wondering at wich point the maximum concentration is reached, and i start to see solid zinc on the bottom.

I could go on desolving and see for myself but since its really time consuming maybe anyone here allready knows something about this.

Would really like to know this!!