General Method Of Cleaning Mankato Stone/Yellow Kasota Marble
- Procedure code:
- Hsr - Federal Bldg/P.O., Wash, Dc - Bldg Conservation Tech
- Last Modified:
GENERAL METHOD OF CLEANING MANKATO STONE/YELLOW KASOTA MARBLE
A. This procedure includes guidance on mild cleaning of
interior Mankato stone surfaces such as baseboards,
wainscoting, pilasters, door surrounds and cornices.
B. Mankato stone is also known as Yellow Kasota or Floridene
C. Yellow Vein Kasota Marble is warm to pale yellow in
appearance and slightly streaked with thin dark markings.
D. Yellow Fleuri Kasota Marble is warm yellow and mottled by
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 Tripolyphosphate:
1. A crystalline salt (NA5P2010) used chiefly as a
builder in soaps and detergents, as a sequestering
agent and as a deflocculating agent.
2. Other chemical or common names include Penta-sodium
3. Available from chemical supply house.
4. Used in the making of general cleansers,
dishwashing liquids or laundry detergent; It is a
chemical responsible for increasing the sudsing
action in cleaners. Depending on the amount added,
it also conditions water, facilitates rinsing, aids
in dispersion of soil and removes soap film from
B. Clean, Potable Water
C. Natural Bristle Brushes
D. Clean, Soft Cloths
A. Protection: Protect all masonry and metal surfaces
immediately adjacent to or below the area to be cleaned
by covering with polyethylene sheeting.
3.02 ERECTION, INSTALLATION, APPLICATION
A. Mix 5% sodium tripolyphosphate solution using warm water.
B. Apply the cleaning solution to the standing stone with a
soft natural bristle brush working from the bottom of the
wall up. Wash in small overlapping areas.
C. Rinse each cleaned area thoroughly with fresh clear water
using sponges to remove traces of cleaner. Use clean
chamois or clean soft cloths to dry and buff the surface
and prevent streaking.
END OF SECTION