§ 234. Quality; contents. There shall not be applied to any article
any quality mark nor any colorable imitation thereof, nor any
contraction thereof, nor any addition thereto, nor any words or letters,
nor any mark purporting to be or resembling a quality mark except as
follows:

(a) An article consisting of at least 985/1000ths parts of platinum,
iridium, palladium, ruthenium, rhodium and/or osmium, where solder is
not used and at least 950/1000ths parts of said metal or metals where
solder is used, may be marked "platinum," provided that the total of the
aforementioned metals other than pure platinum shall amount to no more
than 50/1000ths parts of the contents of the entire article.

(b) An article consisting of at least 985/1000ths parts of platinum,
iridium, palladium, ruthenium, rhodium and/or osmium, where solder is
not used and at least 950/1000ths parts of the said metal or metals
where solder is used, and provided further that at least 750/1000ths
parts of said article are pure platinum, may be marked "platinum,"
provided immediately preceding the mark "platinum" there is the name or
abbreviation as hereinafter provided, of either iridium, palladium,
ruthenium, rhodium and/or osmium, which ever of said metals
predominates, and provided further that such predominating other metal
must be more than 50/1000ths parts of the entire article.

(c) An article consisting of at least 985/1000ths parts of platinum,
iridium, palladium, ruthenium, rhodium and/or osmium, where solder is
not used and at least 950/1000ths parts of said metals where solder is
used, provided more than 500/1000ths parts of said article consist of
pure platinum, may be marked with the word "platinum," provided that
said word is immediately preceded by a decimal fraction in
one-thousandths showing the platinum content in proportion to the
content of the entire article, and further provided that said mark
"platinum" be followed by the name or abbreviation as herein allowed, of
such one or more of the following metals, to wit: iridium, palladium,
ruthenium, rhodium and/or osmium, that may be present in the article in
quantity of more than 50/1000ths parts of the entire article. The name
of such other metal or metals other than platinum, however, shall each
be immediately preceded by a decimal fraction in one-thousandths showing
the content of such other metal or metals in proportion to the entire
article, as for example, 600 plat., 350 pall., or 500 plat., 200 pall.,
150 ruth., 100 rhod.

(d) An article consisting of 950/1000ths parts of the following
metals: platinum, iridium, palladium, ruthenium, rhodium, and/or osmium
with less than 500/1000ths parts of the entire article consisting of
pure platinum, may be marked with the name iridium, palladium,
ruthenium, rhodium and/or osmium, which ever predominates in the said
article but in no event with the mark "platinum," provided, however,
that the quantity of such metal other than platinum so marked, must be
marked in decimal thousandths, and provided further that the name of
such metal other than platinum so used must be spelled out in full
irrespective of any other provisions of this article to the contrary.

(e) An article composed of platinum and gold which resembles, appears
or purports to be platinum, may be marked with a karat mark and the
platinum mark, provided:

1. The platinum in such article shall be at least 985/1000ths parts
pure platinum; and

2. The fineness of the gold in such article shall be correctly
described by the karat mark of said gold; and

3. The percentage of platinum in such article shall be no less than
five per centum in weight of the total weight of the article; and

4. The mark shall be so applied that the karat mark shall immediately
precede the platinum mark, as for example, "14K & Plat.", "18 K &
Plat.", as the case may be, it being expressly provided that in case the
percentage of platinum exceeds the five per centum provided herein, the
quality mark may also include a declaration of the percentage of
platinum, as for example, "18 K & 1/10th Plat.", or "14 K & 1/8 Plat."
or as the case may be.

(f) An article composed of platinum and any other material or metal
not resembling, appearing or purporting to be platinum, may be marked
with the quality mark platinum provided all parts or portions of such
article resembling or appearing or purporting to be platinum, or
reasonably purporting to be described as platinum by said quality mark,
shall be at least 985/1000ths parts pure platinum.