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Historic Preservation - Technical Procedures

Spectitle:

Removing Grease Stains From Ceramic Tile

Procedure code:

0931004R

Source:

Hspg Prepared For Nps - Sero

Division:

Finishes

Section:

Ceramic Tile

Last Modified:

11/12/2014

Details:

Removing Grease Stains From Ceramic Tile



REMOVING GREASE STAINS FROM CERAMIC TILE


THE CLEANING OR REMOVAL OF STAINS FROM TILE MAY INVOLVE THE USE OF
LIQUIDS, DETERGENTS OR SOLVENTS WHICH MAY RUN OFF ON ADJACENT
MATERIAL, DISCOLOR THE TILE OR DRIVE THE STAINS DEEPER INTO POROUS
TILE.  USE THE PRODUCTS AND TECHNIQUES DESCRIBED HERE ONLY FOR THE
COMBINATIONS OF DIRT/STAIN AND TILE SPECIFIED.


PART 1---GENERAL

1.01 SUMMARY

    A.   This procedure includes guidance on removing grease
         stains from ceramic tile.

    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).


PART 2---PRODUCTS

2.01 MANUFACTURERS

    A.   The Procter & Gamble Co.
         www.pg.com 


2.02 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.   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.

         -OR-

         Sodium Hydroxide (NaOH): (as alternative)

         1.   A white brittle solid that is a strong caustic base
              used especially in making soap, rayon, and paper.

         2.   Other chemical or common names include Caustic
              soda*; Hydrate of soda*; Hydrated oxide of sodium*;
              Lye*; Mineral alkali*; Soda lye*; Sodic hydrate*;
              Sodium hydrate*.

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

         4.   Available from chemical supply house, drugstore or
              pharmaceutical supply distributor, hardware store,
              or paint store.

    B.   Neutral pH Detergent such as "Orvus" (Procter and
         Gamble), or approved equal, using dilution as determined
         by tests on material to be cleaned.

    C.   Clean, potable water

2.03 EQUIPMENT

    A.   Clean natural fiber rags

    B.   Garden hose and pneumatic spray nozzle

    C.   Stiff bristle brushes (no iron wire)

    D.   Wood scrapers, knife blades and spatulas


PART 3---EXECUTION

3.01 EXAMINATION

    A.   Examine the ceramic tile surface carefully to determine
         the type and cause of staining before proceeding with any
         cleaning operation.

3.02 ERECTION, INSTALLATION, APPLICATION

    A.   Mix 10% sodium carbonate in water (use 5% sodium
         hydroxide or caustic soda if required).

    B.   Wash the surface with the solution using a stiff bristle
         brush; Allow the mixture to remain on the surface for
         approximately 1 hour.

    C.   Rinse thoroughly with clean, clear water and allow to
         dry.

    D.   Repeat the process as required to achieve the desired
         level of cleanliness.

                             END OF SECTION
 


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