Code of Maine Rules › 06 - DEPARTMENT OF ENVIRONMENTAL PROTECTION › 096 - DEPARTMENT OF ENVIRONMENTAL PROTECTION - GENERAL › Chapter 161 - GRAPHIC ARTS - OFFSET LITHOGRAPHY AND LETTERPRESS PRINTING › Section 096-161-2 - Definitions

Current through 2024-29, July 17, 2024
A.
Actual Emissions.
"Actual
				Emissions" means calculating a VOC mass balance over a period of time, using
				invoices and usage records to determine amounts of ink, fountain solution and
				cleaning solutions purchased and used; multiplied by an applicable emission
				retention factor.
B.
Alcohol.
"Alcohol" means any of the following compounds, when used
				as a fountain solution additive for offset lithographic or letterpress
				printing: ethanol, n-propanol, and isopropanol.
C.
Alcohol substitute.
"Alcohol
				substitute"means any non-alcohol additives that contain VOCs and are used in
				the fountain solution; including, but not limited, to ethylene glycol or glycol
				ether compounds. Some additives are used to reduce the surface tension of
				water: others are added to prevent piling (ink build-up).
D.
Automatic
Blanket
Wash
System.
"Automatic
				Blanket Wash System" means equipment used to clean lithographic blankets which
				can include, but is not limited to, those utilizing a cloth and expandable
				bladder, brush, spray, or impregnated cloth system.
E.
BACT.
"BACT" means Best
				Available Control Technology as defined in
Definitions
				Regulation
06-096 CMR 100 effective December 24, 2005).
F.
CAM.
"CAM" means Compliance
				Assurance Monitoring as described in 40 CFR Part 64.
G.
Cleaning Solution.
"Cleaning
				Solution" means any liquid solvent or solution used to clean the operating
				surfaces of a printing press and its parts. For purposes of this Chapter,
				cleaning solutions include, but are not limited to, blanket wash, roller wash,
				metering roller cleaner, plate cleaner, impression cylinder washes, rubber
				rejuvenators, and other cleaners used for cleaning a press, press parts, or to
				remove dried ink or coating from areas around the press.
H.
Control device.
"Control
				device" means equipment used to reduce, by destruction or removal, the amount
				of air pollutant(s) in an air stream prior to discharge to the ambient
				air.
I.
Dampening
				System.
"Dampening system" means equipment used to deliver the fountain
				solution to the lithographic plate.
J.
Fountain Solution.
"Fountain
				solution" means a mixture of water and other volatile and non-volatile
				chemicals and additives that maintains the quality of the printing plate
				including preventing debris build up (e.g., spray power, paper fiber, coating
				particles, dried ink particles and other materials), and increases viscosity
				and reduces the surface tension of the water so that is spreads easily across
				the printing plate service. The fountain solution wets the non-image area so
				that the ink is maintained within the image areas. Non-volatiles additives
				include mineral salts and hydrophilic gums. Alcohol and alcohol substitutes are
				the most common VOC additives used to reduce the surface tension of the
				fountain solution.
K.
Fountain Solution Reservoir.
"Fountain Solution Reservoir" means
				the collection tank that accepts fountain solution recirculated from printing
				unit(s). In some cases, the tanks are equipped with cooling coils for
				refrigeration of the fountain solution.
L.
Heatset.
"Heatset"means any
				operation where the printing inks are set by the evaporation of the ink oils in
				a heatset dryer.
M.
Heatset
				Dryer.
"Heatset dryer" means any device used in heatset web offset
				lithographic printing to heat the printed substrate and to promote the
				evaporation of ink oils.
N.
Inking System.
"Inking System" means a series of rollers used to
				meter ink onto the lithographic plate. The system can include agitators, pumps,
				totes, and others types of ink containers.
O.
Letterpress printing press.
"Letterpress Printing press" means a printing press that uses a relief method
				which uses type directly. Printing is done from cast metal type or plates on
				which the image or printing areas is raised above the nonprinting areas. Ink
				rollers touch on the surface of the raised areas. The surrounding (nonprinting)
				areas are lower and do not receive ink. The inked image is transferred directly
				to the paper.
P.
Lithography.
"Lithography" means a planographic printing process
				where the image and nonimage areas are chemically differentiated; the image
				area is oil receptive and the nonimage area is water receptive. This method
				differs from other printing methods, where the image is typically printed from
				a raised or recessed surface.
Q.
Non-heatset. "
Non-heatset" means a printing process where the
				printing inks are set by absorption and/or oxidation of the ink oil, not by
				evaporation of the ink oils in a dryer. For the purposes of this Chapter, use
				of an infrared heater or printing conducted using ultraviolet-cured or electron
				beam-cured inks is considered non-heatset.
R.
Offset.
"Offset" means a
				printing process that transfers the ink film from the lithographic plate to an
				intermediary surface (blanket), which, in turn, transfers the ink film to the
				substrate.
S.
Press.
"Press" means printing production assembly composed of one or more units used
				to produce a printed substrate including any associated coating, spray power
				application, heatset web dryer, ultraviolet or electron beam curing units, or
				infrared heating units.
T.
Sheet fed.
"Sheet fed" means any operation where paper is fed to
				the press in individual sheets.
U.
Substrate.
"Substrate" means the surface to which a coating is
				applied.
V.
VOC Composite
				Partial Vapor Pressure
- "VOC Composite Partial Vapor Pressure" means
				the sum of the partial pressure of the compounds defined as VOCs. VOC composite
				partial vapor pressure is calculated as follows:
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Where:
Wi = Weight of the "i"th VOC compound,
				  in grams
Ww = Weight of water, in grams
Wc = Weight of exempt compound, in
				  grams
MWi = Molecular weight of the "i"th
				  VOC 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 = VOC composite partial vapor
				  pressure at 20[DEGREE]C (68[DEGREE]F), in mm Hg
VPi = Vapor pressure of the "i"th VOC
				  compound at 20[DEGREE]C (68[DEGREE]F), in mm Hg
W.
Web
. "Web" means a continuous
				roll of paper used as a printing substrate.