Hypo - alum more how ?

[Rob Hale]

Hi

Quick question. When you mix potassium alum solution into sodium thiosulphate solution do you get a white to cream coloured precipitate ?

And if so does it settle out to the bottom ?

Regards

Rob.

[Richard L]

Yes. That milky stuff does nothing apart from looking a bit nasty, and I found it settles on the surface of a print while in the solution, so I wipe it off to check how a print is doing.
Wont matter if it ends up in your working solution.
Rich

[marty]

Yep, nothing to worry about. It also tends to stick to the bottom of the bottle but again no big trouble.

Cheers, M.

[Rob Hale]

Hi,
Richard L & Marty thanks for your answers I will stop worrying about it but it “don’t half stick” on to anything it dry’s on.

Regards

Rob