Removing Iodine Stains From Terrazzo Floors

Procedure code:
940009S
Source:
Developed For Hspg (Nps - Sero)
Division:
Finishes
Section:
Terrazzo
Last Modified:
03/13/2017

REMOVING IODINE STAINS FROM TERRAZZO FLOORS

PART 1---GENERAL

1.01 SUMMARY

A. This procedure includes guidance on removing iodine

stains from terrazzo floors.

B. Iodine is a nonmetallic element used especially in

medicine, photography and analysis.

C. 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).

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. Rubbing* or Isopropyl Alcohol (C3H8O):

1. A volatile flammable alcohol used especially as a

solvent and rubbing alcohol.

2. Other chemical or common names include Dimethyl

carbinol; Isopropanol; 2-propanol.

3. Available from chemical supply house, dry cleaning

supply distributor, drug store, hardware store,

paint store or printer's supply distributor.

B. Whiting:

CAUTION: DO NOT USE WHITING WITH ACID (SUCH AS IN A

POULTICE), AS WHITING IS A CARBONATE AND REACTS WITH ACID

TO PRODUCE CARBON DIOXIDE. THIS REACTION IS NOT

DANGEROUS; HOWEVER, THE COMBINATION RENDERS THE ACID

INEFFECTIVE AND PRODUCES A FOAMY MESS.

1. Other chemical or common names include Powdered

chalk. Kitchen flour may also be substituted.

2. Available from paint store.

-0R-

Talcum Powder: Available from drugstore or

pharmaceutical supply distributor.

2.02 EQUIPMENT

A. Wooden Paddle or Trowel

B. Shallow Enameled Pan

PART 3---EXECUTION

3.01 EXAMINATION

A. Examine the terrazzo surface carefully to determine the

cause of staining. Eliminate cause 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. An iodine stain will gradually disappear without

treatment.

B. For quick removal, apply alcohol and cover it with

whiting or talcum powder.

C. If the stain occurs on a vertical surface, talcum should

be mixed with alcohol to form a paste. Alcohol is first

applied to the stain, and it is then covered with the

paste.

D. Remove dried paste with wooden spatula.

E. Rinse thoroughly with clean, clear water and repeat the

process as required until stain is no longer noticeable.

print Share Icon Last Reviewed 2017-11-30