REMOVING COFFEE STAINS FROM TERRAZZO FLOORS 


PART 1---GENERAL

1.01 SUMMARY

     A.   This procedure includes guidance on removing coffee
          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.   Glycerine:

          1.   A sweet syrupy hygroscopic trihydroxy alcohol
               usually obtained by the saponification of fats and
               used especially as a solvent and plasticizer.

          2.   Other chemical or common names include Glycerol;
               Glyceryl hydroxide; Glycyl alcohol; 1,2,3-
               propanetriol; Propenyl alcohol.

          3.   Potential Hazards:  FLAMMABLE.

          4.   Available from chemical supply house, drug store or
               hardware store.

     B.   Clean, potable water

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 before proceeding with any cleaning
          operation.

3.02 ERECTION, INSTALLATION, APPLICATION 

     NOTE:  THE FOLLOWING TREATMENT 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.  TEST BEFORE PROCEEDING.

     A.   Saturate a cloth in glycerine diluted with 4 times its
          volume in water and apply to stain.

     B.   Thoroughly the surface with clean, clear water and allow
          to dry.

     C.   Repeat the process as necessary to achieve the desired
          level of cleanliness.

     Note:  See also treatment for blue ink stains for other stain
     removing solutions, 09400-01-R.

                              END OF SECTION