That recipe is taken from book dedicated to chemical restoration techniques: ISBN 5-7245-0274-7, 1990.

Method 1.

1. AgNO3, 5g + water, 60ml. Divide to 20 and 40 ml solutions.

2. 40ml of Solution(1) + NH4OH, slowly, active mixing. Dark precipitation occurs.

3. Solution(2) + 20ml of Solution(1), add 5ml per 2 sec. Then add NH4OH. You obtain cloudy solution (otherwise, add more AgNO3 solution).

4. Solution (3) diluted up to 500ml.

Now we can reduce Ag to obtain metalic layer.

1. Refined sugar, 75g + water, 500-600 ml

2. Solution(1) + H2SO4, 10ml, 10%. Boil for 5-6 h

3. Solution(2) becomes dark-yellow. Cool it.

4. Dilute soluion(3) up to 1L.

5. Before using dilute 10 times.

When you mix 2 solutions Ag is reduced as precipitate: Ag(NH3)2OH -> Ag + NH3 + OH-

That recipe is taken from book dedicated to chemical restoration techniques: ISBN 5-7245-0274-7, 1990.

Method 1.

1. AgNO3, 5g + water, 60ml. Divide to 20 and 40 ml solutions.

2. 40ml of Solution(1) + NH4OH, slowly, active mixing. Dark precipitation occurs.

3. Solution(2) + 20ml of Solution(1), add 5ml per 2 sec. Then add NH4OH. You obtain cloudy solution (otherwise, add more AgNO3 solution).

4. Solution (3) diluted up to 500ml.

Now we can reduce Ag to obtain metalic layer.

1. Refined sugar, 75g + water, 500-600 ml

2. Solution(1) + H2SO4, 10ml, 10%. Boil for 5-6 h

3. Solution(2) becomes dark-yellow. Cool it.

4. Dilute soluion(3) up to 1L.

5. Before using dilute 10 times.

When you mix 2 solutions Ag is reduced as precipitate: Ag(NH3)2OH -> Ag + NH3 + OH-