51:6-5. Marking contents and quality of pure platinum and platinum combined with other metals
There shall not be applied to any article any quality mark or 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 nine hundred and eighty-five one-thousandths parts of platinum, iridium, palladium, ruthenium, rhodium, or osmium, or any or all of them, where solder is not used, and at least nine hundred and fifty one-thousandths parts of said same 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 fifty one-thousandths parts of the contents of the entire article;
b. An article consisting of at least nine hundred and eighty-five one-thousandths parts platinum, iridium, palladium, ruthenium, rhodium, or osmium, or any or all of them, where solder is not used, and at least nine hundred and fifty one-thousandths parts of the said same metal or metals where solder is used, provided at least seven hundred and fifty one-thousandths parts of such article are pure platinum, may be marked "platinum" ; provided, that immediately preceding the mark "platinum" there is marked the name or abbreviation as hereinafter provided, of either iridium, palladium, ruthenium, rhodium, or osmium, or any or all of them, whichever of said metals predominates; but such predominating other metal must be more than fifty one-thousandths parts of the entire article;
c. An article consisting of at least nine hundred and eighty-five one-thousandths parts of platinum, iridium, palladium, ruthenium, rhodium, or osmium, or any or all of them, where solder is not used and at least nine hundred and fifty one-thousandths parts of said same metals where solder is used, provided more than five hundred one-thousandths 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 provided, further, that the 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, or osmium, or any or all of them, that may be present in the article in quantity of more than fifty one-thousandths 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 nine hundred and fifty one-thousandths parts of the following metals: platinum, iridium, palladium, ruthenium, rhodium, or osmium, or any or all of them, with less than five hundred one-thousandths parts of the entire article consisting of pure platinum, may be marked with the name iridium, palladium, ruthenium, rhodium, or osmium, or any or all of them, whichever 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 that the name of such metal other than platinum so used must be spelled out in full, irrespective of any other provision of this chapter 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 nine hundred and eighty-five one-thousandths parts pure platinum; and
2. The fineness of the gold in such article shall be correctly described by the karat mark of such gold; and
3. The percentage of platinum in such article shall be no less than five per cent 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, "14 K & Plat." , "18 K & Plat." , as the case may be, it being expressly provided that in case the percentage of platinum exceeds the five per cent provided herein the quality mark may also include a declaration of the percentage of platinum, as for example, "18 K & 1/10 th Plat." , or "14 K & 1/8 th 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, that 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 nine hundred and eighty-five one-thousandths parts pure platinum.