Message:

<p>[QUOTE=&quot;Roerbakmix, post: 6648522, member: 100731&quot;]Thanks! There is no &#039;one size fits all&#039; answer. It depends on the deposits and the coin. Regarding the concentration: some thick deposits require higher concentrations (e.g. 5g / 30ml purified water) whereas others require more diluted concentrations (e.g. 1g / 30 ml purified water). Regarding the temperature: care should be taken to gradually increase the temperature. I usually heat the solution to c. 60 C and gently drop the coin, then after a minute or so, I create a new solution at c. 100 C. </p><p><br /></p><p>Also, note that sodium thiosulphate is rather instable and will degrade in sulphur, amongst other. This may cause a thin yellow deposit on your coin, which you want to avoid. Hence, I don&#039;t use my solution for longer than 1-2 minutes.[/QUOTE]</p><p><br /></p>

Your name or email address:

Do you already have an account?

• No, create an account now.
• Yes, my password is:
• Forgot your password?

Stay logged in