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Historic Preservation - Technical Procedures
Making Javelle Water
Hstrc Concrete: Investigation & Rpr/Pre-Conf Training - 1989
Making Javelle Water
MAKING JAVELLE WATER
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
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.
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
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
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
A. Enameled shallow pan
B. Rubber or plastic buckets or stoneware jar
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