I have just purchased my first cyanotype kit (the classic version) and I didn't knew that one has to prevent mould in sollution A.
In the instruction is says that I can use formalin. I went to my farmacist (sp) and the only thing they had was formaldehyd (I hope you understand what it is, but I think that they have mixed formalin with water or alcohol). The sollution is only 4%.
My question is will this prevent mould?
The instruction says that I should use 1ml (in a 50ml sollutin) of formalin, but I guess I have to add some more now?
I know about the newer Cyanotype, but I wonder what I can do now.