3 Pa. Stat. § 141
The words "linseed oil," as used in this act, shall mean an oil, wholly the product obtained from pure flaxseed, and conforming to the following requirements:
First. Its specific gravity, at a temperature of fifteen and five-tenths degrees centigrade, shall be not less than nine thousand three hundred and fifteen ten-thousandths (.9315), nor greater than nine thousand three hundred and sixty ten-thousandths (.9360).
Second. Its acid value shall not exceed six (6).
Third. Its saponification value (Koettstorfer number) shall be not less than one hundred and eighty-seven (187), nor greater than one hundred and ninety-five (195).
Fourth. It shall not contain more than one and one-half per centum of unsaponifiable matter.
Fifth. Its iodine value (Hanus number) shall be not less than one hundred and seventy (170), nor greater than one hundred and ninety (190).
The words "boiled linseed oil," as used in this act, shall mean linseed oil, as above defined, which has been heated to a temperature of at least one hundred and seven degrees centigrade, and conforming to the following requirements:
First. It shall not contain free rosin or rosin oil, nor shall it contain rosin as resinates in excess of one per centum.
Second. It shall not contain more than two per centum of unsaponifiable matter.
Third. Its saponification value (Koettstorfer number) shall be not less than one hundred and eighty-five (185), nor greater than one hundred and ninety-five (195).
Fourth. Its iodine value (Hanus number) shall be not less than one hundred and sixty (160), nor greater than one hundred and ninety (190).
Fifth. Its specific gravity, at a temperature of fifteen and five-tenths degrees centigrade, shall be not less than nine thousand three hundred and twenty-five ten thousandths (.9325), nor greater than nine thousand four hundred and fifty ten thousandths (.9450).
3 P.S. § 141