North Carolina Administrative Code › Title 15A - Environmental Quality › Chapter 02 - Environmental Management › Subchapter D - AIR POLLUTION CONTROL REQUIREMENTS › Section .0900 - VOLATILE ORGANIC COMPOUNDS › Section 02D .0961 - OFFSET LITHOGRAPHIC PRINTING AND LETTERPRESS PRINTING

Current through Register Vol. 39, No. 2, July 15, 2024
(a) For the
				  purposes of this Rule, the definitions listed in this Paragraph and 15A NCAC
				  02D .0101 and 02D .0902 shall apply.
(1)
				  "Composite partial vapor pressure" means the sum of the partial pressure of the
				  compounds defined as volatile organic compounds. Volatile organic compounds
				  composite partial vapor pressure is calculated as follows:
#North
					 Carolina Register Volume 38, Issue 11, December 1, 2023#
Where:
Wi = Weight of the "i" volatile organic compound, in
					 grams
Ww = Weight of water, in grams
Wc = Weight of exempt compound, in grams
MWi = Molecular weight of the "i" volatile organic
					 compound, in g/g-mole
MWw = Molecular weight of water, in g/g-mole
MWc = Molecular weight of exempt compound, in
					 g/g-mole
PPc = Volatile organic compounds composite partial vapor
					 pressure at 20 degrees Celsius (68 degrees Fahrenheit), in mm Hg
VPi = Vapor pressure of the "i" volatile organic compound
					 at 20 degrees Celsius (68 degrees Fahrenheit), in mm Hg
(2) "First installation date" means the
				  actual date when this control device becomes operational. This date does not
				  change if the control device is later redirected to a new press.
(3) "Fountain solution" means water-based
				  solution that applies to lithographic plate to render the non-image areas
				  unreceptive to the ink.
(4)
				  "Heatset" means any operation in which heat is required to evaporate ink oils
				  from the printing ink, excluding ultraviolet (UV) curing, electron beam curing,
				  and infrared drying.
(5)
				  "Letterpress printing" means a printing process in which the image area is
				  raised relative to the non-image area and the paste ink is transferred to the
				  substrate directly from the image surface.
(6) "Non-heatset," also referred to as
				  "coldset," means a lithographic printing process where the printing inks are
				  set by absorption or oxidation of the ink oil, not by evaporation of the ink
				  oils in a dryer. For the purposes of this Rule, use of an infrared heater or
				  printing conducted using ultraviolet-cured or electron beam-cured inks is
				  considered non-heatset.
(7) "Offset
				  lithography" means a printing process that uses sheet-fed or web method of
				  press feeding and transfers ink from the lithographic plate to a rubber-covered
				  intermediate "blanket" cylinder and then from the blanket cylinder to the
				  substrate.
(8) "Press" means a
				  printing production assembly composed of one or more units used to produce a
				  printed substrate including any associated coating, spray powder application,
				  heatset web dryer, ultraviolet or electron beam curing units, or infrared
				  heating units.
(9) "Sheet-fed
				  printing" means offset lithographic printing when individual sheets of paper or
				  other substrate are fed to the press.
(10) "Web printing" means offset lithographic
				  printing when continuous rolls of substrate material are fed to the press and
				  rewound or cut to size after printing.