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From Section 9 of the American National Standard Institute (ANSI) for Ceramic tile
installation.
PURPOSE OF GRADE MARKING
Grade marking is fundamental to an understanding of tile grades, to the proper and
satisfactory use of tile, to gaining consumer good will, and to the fullest development
of the ceramic tile industry. Various grade names used by architects, manufacturers
and contractors without definition or specifications are confusing and tend to encourage
misrepresentation and substitution. Grade marking that is practical and understandable
prevents tampering, discourages the shipping of mixed grades in the same container,
establishes the responsibility, and serves as a protection to the consumer.
DEFINITION OF GRADES
Standard Grade: Ceramic tile that meets the requirements of these
specifications.
Second Grade (Seconds): Ceramic tile that meets all of the requirements
of these specifications except that inspection of facial defects is conducted at
a distance of 10 feet instead of 3 feet.
LABELING PROCEDURES
Quarry Tile: Quarry tile required to be in accordance with this
standard shall be shipped in sealed packages with the claim of grade conformance
either imprinted on the package or on a paper label adhesively attached to the package
according to the manufacturers practice. The paper color of the label shall be blue
for Standard Grade and yellow for Second Grade. When a label is used, it shall be
adhered to the package so that the package cannot be opened without breaking the
label.
CERTIFICATION
Certification of each shipment of tile shall be in accordance with the Master Grade
Certificate. A Master Grade Certificate is issued by the tile manufacturer to the
tile contractor only upon the contractor's request before shipment is made and is
used to certify a particular shipment. These certificates shall give adequate information
to identify the specific containers to which they apply.
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