Etching solution | Nancy Drew: The Deadly Device

Prepare the etching solution:

Go back to the mixing booth left of the supply cabinet. The HF automatically goes on the shelf.

The Solutions book says to use for Amateur: 3 parts of Hydrofluoric acid (HF) + 1 part Nitric Acid (HNO3) + 4 parts Water (H2O) for silicon base wafers.

Take Hydrofluoric acid (HF) and pour some on the 3 ml graduated cylinder. Take the poured acid and empty it on the white beaker.
Take Nitric acid (HNO3) and pour some on the 4 ml graduated cylinder. Pour the 4 ml Nitric acid in graduated cylinder on to the 3 ml cylinder. Pour the remaining 1 ml of Nitric acid in the graduated cylinder into the white beaker.

Take the water (H2O) on the sink and pour some into the 4 ml graduated cylinder. Pour the 4 ml water into the white beaker.
Take the mixture in the white beaker and pour it into one of the brown bottle on the top shelf at left to get formula.
If an error is made, pour it in the Hazardous waste disposal at right.
The Solutions book says to use for Master: 2 parts of Hydrofluoric acid (HF) + 2 parts Nitric Acid (HNO3) + 1 part Water (H2O) for silicon base wafers.

Take Hydrofluoric acid (HF) and pour some on the 3 ml graduated cylinder. Pour the 3 ml into the 4 ml graduated cylinder.
Fill the 3 ml cylinder HF again. Pour the 3 ml again into the 4 ml cylinder leaving 2 ml in the 3 ml cylinder. Take this 2 ml acid and empty it on the white beaker.

Empty the 4 ml cylinder into the Hazardous waste disposal at right.
Do the same for the Nitric acid. Take Nitric acid (HNO3) and pour it on 3 ml graduated cylinder. Pour the 3 ml into the 4 ml graduated cylinder.

Fill the 3 ml cylinder HNO3 again. Pour the 3 ml again into the 4 ml cylinder leaving 2 ml in the 3 ml cylinder. Take this 2 ml acid and empty it on the white beaker.

Empty the 4 ml cylinder into the Hazardous waste disposal at right.
Take the water (H2O) on the sink and pour some on the 4 ml graduated cylinder. Pour the 4 ml water in graduated cylinder on to the 3 ml cylinder. Pour the remaining 1 ml of water in the graduated cylinder into the white beaker.

Take the mixture in the white beaker and pour it into one of the brown bottle on the top shelf at left to get formula.