Removing Ink Stains From Terrazzo Floors

Procedure code:
940001S
Source:
Developed For Hspg (Nps - Sero)
Division:
Finishes
Section:
Terrazzo
Last Modified:
03/13/2017

PART 1---GENERAL

REMOVING INK STAINS FROM TERRAZZO FLOORS

1.01 SUMMARY

A. This procedure includes guidance on removing ink stains

from terrazzo floors.

B. See 01100-07-S for general project guidelines to be

reviewed along with this procedure. These guidelines

cover the following sections:

1. Safety Precautions

2. Historic Structures Precautions

3. Submittals

4. Quality Assurance

5. Delivery, Storage and Handling

6. Project/Site Conditions

7. Sequencing and Scheduling

8. General Protection (Surface and Surrounding)

These guidelines should be reviewed prior to performing

this procedure and should be followed, when applicable,

along with recommendations from the Regional Historic

Preservation Officer (RHPO).

C. For general information on the characteristics and

maintenance of terrazzo, see 09400-01-P.

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. For Ordinary Ink Stains:

1. Sodium Perborate:

a. Other chemical or common names include

Perborax*.

b. Potential Hazards: TOXIC AND FLAMMABLE (WHEN

IN CONTACT WITH ORGANIC SOLVENTS).

c. Available from chemical supply house,

drugstore or pharmaceutical supply

distributor, grocery store or supermarket.

2. Hot water

3. Whiting:

a. Other chemical or common names include

Powdered chalk. Kitchen flour may also be

substituted.

b. Available from paint store.

B. For Bright-Colored Ink Stains:

1. Ammonia water:

CAUTION: DO NOT MIX AMMONIA WITH CHLORINE

BLEACHES, A POISONOUS GAS WILL RESULT! DO NOT USE

BLEACH ON BIRD DROPPINGS.

a. A weakly basic compound that is formed when

ammonia dissolves in water and that exists

only in solution.

b. Other chemical or common names include

Ammonium Hydroxide; Aqua ammonia*; Household

ammonia*.

c. Potential hazards: TOXIC; MAY IRRITATE THE

EYES.

d. Available from chemical supply house, grocery

store or pharmaceutical supply distributor, or

hardware store.

2. Cotton batting

3. Javelle water (Made by user). See 03710-02-S for

materials, equipment and procedures for preparing

Javelle Water.

C. For Blue Ink and Indelible Ink Stains:

1. Ammonia water (see Section 2.01 B.1. above)

2. Cotton batting or cotton gauze

2.02 EQUIPMENT

A. Wooden Paddle or Trowel

B. Stoneware Jar

C. Shallow Enameled Pan

D. Electric or battery powered scrubbing machines

PART 3---EXECUTION

3.01 EXAMINATION

A. Examine the terrazzo surface carefully to determine the

cause of staining before proceeding with any cleaning

operation.

3.02 ERECTION, INSTALLATION, APPLICATION

NOTE: THE FOLLOWING TREATMENTS SHOULD BE USED BY TRAINED AND

EXPERIENCED PERSONNEL. IMPROPER USE MAY RESULT IN BLEACHING

THE TERRAZZO MATRIX, IF A COLOR DYE WAS ADDED AT THE TIME OF

INSTALLATION.

A. For Ordinary Writing Inks:

1. Make a strong solution of sodium perborate in hot

water and mix with whiting to form a thick paste.

2. Thoroughly wet the surface to be treated with

clean, clear water.

3. Apply the mixture to the stained area in a 1/4 inch

thick layer using a wood or plastic spatula and

allow to dry. Be sure to spread the poultice well

beyond the stained area. The liquid portion of the

paste will migrate into the masonry where it will

dissolve some of the staining material. Then the

liquid will gradually move back beyond the masonry

surface and into the poultice, where it will

evaporate, leaving the dissolved staining material

in the poultice.

4. When the poultice has dried, brush or scrape it off

with a wooden scraper.

5. Using a stiff bristle brush, scrub the surface with

scouring powder and clean water to remove any

residual staining.

6. Thoroughly rinse the area with clean, clear water

and blot dry with clean towels.

B. For Bright-colored Inks:

1. Use a sodium perborate poultice as described in

Section 3.02 A. above.

-OR-

Saturate cotton batting in ammonia water.

-OR-

Saturate cotton batting in javelle water (see

03710-02-S for procedures on preparing Javelle

Water) and mix with whiting to form a thick paste.

-OR-

Mix equal parts of chlorinated lime and whiting

reduced to a paste with water.

2. Follow poultice preparation and application

procedures described above in Section 3.02 A.2-7.

Repeat the treatment as necessary to achieve the

desired level of cleanliness.

C. For Blue Inks: Some blue ink stains cannot be removed by

the perborate poultice, Javelle water, or chlorinated

lime poultice.

1. Saturate cotton batting in ammonia water.

-OR-

Use a strong soap solution in place of ammonia

water.

2. Follow poultice preparation and application

procedures described above in Section 3.02 A.2-7.

Repeat the treatment as necessary to achieve the

desired level of cleanliness.

D. For Indelible Inks:

1. Treat the same as blue ink stains.

2. For more difficult stains such as inks containing

silver salts (causing a black stain), saturate

ammonia water in cotton gauze.

3. Follow poultice preparation and application

procedures described above in Section 3.02 A.2-7.

Repeat the treatment as necessary to achieve the

desired level of cleanliness.

print Share Icon Last Reviewed 2017-11-30