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Historic Preservation - Technical Procedures

Spectitle:

Making Javelle Water

Procedure code:

0371002S

Source:

Hstrc Concrete: Investigation & Rpr/Pre-Conf Training - 1989

Division:

Concrete

Section:

Concrete Cleaning

Last Modified:

02/24/2012

Details:

Making Javelle Water



MAKING JAVELLE WATER


PART 1---GENERAL

1.01 SUMMARY

    A.   This standard includes guidance on making javelle water
         for use in removing specific stains from concrete.  It is
         recommended for use in removal of the following stains:

         1.   Beverage Stains:  See 03710-06-R.

         2.   Fire, Smoke, Soot, Pitch and Wood Tar Stains:  See
              03710-19-R.

         3.   Ink Stains:  See 03710-24-R.

         4.   Perspiration Stains:  See 03710-33-R.

         5.   Plywood or Joint Sealant Stains:  See 03710-34-R.

         6.   Tobacco Stains:  See 03710-37-R.


PART 2---PRODUCTS

2.01 MATERIALS

    NOTE:  Chemical products are sometimes sold under a common
    name.  This usually means that the substance is not as pure as
    the same chemical sold under its chemical name.  The grade of
    purity of common name substances, however, is usually adequate
    for stain removal work, and these products should be purchased
    when available, as they tend to be less expensive.  Common
    names are indicated below by an asterisk (*).

    A.   Calcium Hypochlorite (CaCl2O2):

         1.   A white powder used especially as a bleaching agent
              and disinfectant.

         2.   Other chemical or common names include Chlorinated
              calcium oxide; Bleaching powder*; Calcium
              oxymuriate*; Chloride of lime*; Chlorinated lime*;
              Hypochlorite of lime*; Oxymuriate of lime*.

         3.   Potential Hazards:  CORROSIVE TO FLESH; FLAMMABLE
              (WHEN IN CONTACT WITH ORGANIC SOLVENTS).

         4.   Available from chemical supply house, dry cleaning
              supply distributor, drugstore or pharmaceutical
              supply distributor, janitorial supply distributor,
              swimming pool supply distributor, or water and
              sanitation supply distributor.

    B.   Sodium Carbonate (Na2CO3):

         1.   A sodium salt of carbonic acid used especially in
              making soaps and chemicals, in water softening, in
              cleaning and bleaching and in photography; A
              hygroscopic crystalline anhydrous strongly alkaline
              salt.

         2.   Other chemical or common names include Carbonate of
              soda*; Sal soda*; Soda*; Soda ash*; Washing soda*.

         3.   Potential Hazards:  CORROSIVE TO FLESH

         4.   Available from chemical supply house, grocery store
              or supermarket, hardware store, paint store or
              water and sanitation supply distributor.

    C.   Clean, potable water

2.02 EQUIPMENT

    A.   Enameled shallow pan

    B.   Rubber or plastic buckets or stoneware jar


PART 3---EXECUTION

3.01 ERECTION, INSTALLATION, APPLICATION

    A.   Dissolve 3 pounds of sodium carbonate crystals in 1
         gallon of hot water in a rubber or plastic bucket.

    B.   In a shallow enamel pan, place 12 ounces by weight of
         calcium hypochlorite.  Add water slowly and mix to a
         paste while mashing the lumps.

    C.   Pour the two solutions into another rubber or plastic
         bucket or into a stoneware jar and mix in enough water to
         make a total of 2 gallons of solution.

    D.   Stir well, cover and allow the lime to settle.

    E.   Carefully pour off the liquid for use, leaving the solids
         behind.  The liquid can be siphoned off, but do not start
         the suction by mouth.

                         END OF SECTION