Terry, what strength FO do you use for 20% metal solutions? Regards, Loris. On 22.Tem.2010, at 19:14, Terry King wrote: > ... > If we mix 2 drops of 20 %Pd with 8 drops of 20% Pd and 10 drops of ferric oxalate we have 1 ml of coating mixture. What's the problem and why a need for molar solutions?