1o Stage: DEGREASING

Product                         : K-2B or PH CLEANER-2-PLUS

Concentration             : 5-10%

Temperature                : 70-80 ℃

Immersion Time          : 5-10 minutes

2o Stage: RINSE

Thoroughly rinse in clean overflowing water, preferably warm. A cascade rinse tank proving two rinses is advised at this stage.

3o Stage: BLACK OXIDE

Product                         : KEM BLACK

Concentration             : 1200 grams per liter water

Temperature                : 143 + 2 ℃

Immersion Time          : 15-30 minutes (depending on desired results)

4o Stage: RINSE

Use stage 2

5o Stage: SEALING

Product                         : HIB

Concentration             : 0,2 % (2 grams per liter water)

Temperature                : Ambient

Immersion Time          : 2 minutes

6o Stage: PRESERVE
Immerse parts in WATER DISPLACER (water-displacing rust preventive).

Carefully add the KEM BLACK powder to the cold water under constant agitation or stirring to insure dissolving. When KEM BLACK has been mixed and dissolved, heat the tank until 143 ℃ is reached.

Strict maintenance of the temperature is imperative.

Once a KEM BLACK solution has been prepared it is wise to remember two important facts:

1. Adding KEM BLACK salts will automatically increase the boiling point.
2. Adding water will automatically decrease the boiling point.

The KEM BLACK solution should be maintained warm or hot at all times. If solution is allowed to cool too much, the salts will precipitate out to form a hard cake. Then when the tank is reheated uneven heating will occur and the salts will “burn”. Parts processed in “burnt” salts may not produce a satisfactory black finish.

If the tank is used only a portion of the day, maintain sufficient heating during idle hours to prevent solidification of the solution (70-90 ℃).

The KEM BLACK solution remains effective if it used properly and only replacing drag out losses is necessary.

Maintain the boiling point of the solution at 143 + 2 ℃. If the solution boils at a lower temperature than 143 ℃, add KEM BLACK until the boiling point is established at 143 ℃. If the solution boils at an upper temperature than 143 ℃, add water until the boiling point is established at that point.

Do not use or immerse incompatible or reactive metals, such as aluminum, brass, copper, bronze or tin, cadmium and zinc plated parts. The solution will be poisoned and it will become unusable.