I have been trying POP with some minor success but I would like to try toning it with platinum or something that would produce a similar colour. I have not been able to find Platinum toner [potassium Chloroplatinite I think] in the UK and would welcome you suggestions and advice
You can find Potassium Choroplatinite from Bostick & Sullivan, Artcraft Chemicals and Photographers Formulary. All from USA.
In Europe may be from ph7 in Belgium but not sure.
I have been trying POP with some minor success but I would like to try toning it with platinum or something that would produce a similar colour. I have not been able to find Platinum toner [potassium Chloroplatinite I think] in the UK and would welcome you suggestions and advice