: To remove by erosion or melting. Using water or solvents flexographic printing plates non-image areas are removed.
Azeotropic: A mixture of two or more substances that remains the same composition in the vapor state as in the liquid state.
Clean Air Act (CAA): The clean air act, originally
promulgated in 1970 and amended in 1990 establishes minimum standards
for nationwide protection of the quality of air in the United States and
sets specific pollution limits for the nation, states, and sources of
pollution (manufacturers, automobiles, power plants, etc.)
Clean Water Act (CWA): Promulgated in 1972 and amended
in 1977 the Act established the basic structure for regulating
discharges of pollutants into the waters of the United States. It gave
EPA the authority to implement pollution control programs such as
setting wastewater standards for industry. The Clean Water Act also
continued requirements to set water quality standards for all
contaminants in surface waters. The Act made it unlawful for any person
to discharge any pollutant from a point source into navigable waters,
unless a permit was obtained under its provisions. It also funded the
construction of sewage treatment plants under the construction grants
program and recognized the need for planning to address the critical
problems posed by non point source pollution.
CONEG: Council of Northeastern Governors (CONEG)
Control Technology: Equipment or techniques that reduce the amount of pollution emitted from industrial processes.
Corona Treater: An electrical device used to improve ink
adhesion in flexographic and gravure printing operations. The objective
of the treater is to electrically break down gases at atmospheric
pressure, or electrical discharge All of the Corona Systems require at
least 2 electrodes to initiate and to maintain a discharge. In the case
of web treatment it is done quite effectively by placing the moving film
between High Voltage electrode (metal rod or bar) and a grounded metal
Denaturants: To alter structurally so as to change the nature or qualities of a substance.
Design: Design is the art of communication. The
organization of raw information and images combined with a clear focus
of purpose and intent constitute the elements of design that adds value
to the final piece. Design is meant to inform, educate, persuade,
clarify and inspire. Good design is the commitment to the creative
process, combined with knowledge of production limitations to develop
concepts that ignite interest, move products, and build brands. Often
design has to have impact and it must provide identification and
information about the item. Sometimes the design goal involves the
printed product itself, as with gift wraps, textiles, cups and
Diluent: A liquid having no solvent power by itself, used to thin an ink; not having a solvent action.
Doctor Blade: A thin, flexible blade mounted parallel to
and adjustable against an engraved roll, for the purpose of scraping off
Alt: Thin flexible steel blade that passes over a gravure
plate or cylinder, wiping off excess ink before impression is made on
paper. In the pressroom, refers to the entire assembly consisting of
blade, doctor blade holder, and all necessary adjusting and loading
Durometer: A measurement pertaining to the hardness of a rubber roller.
Electron Beam (EB) Ink: EB-curable coatings, printing
inks and adhesives contain highly reactive molecules. When they are
exposed to ultraviolet light or a beam of accelerated electrons, the
curing reaction takes place instantaneously. The exposure time, and
thus, the curing time is much less than a second.
Environmental Justice (EJ): Environmental Justice is the
fair treatment and meaningful involvement of all people regardless of
race, color, national origin, or income with respect to the development,
implementation, and enforcement of environmental laws, regulations, and
The flexible material made of rubber, nitrile or other flexible, but
durable materials that is imaged with the artwork that is to be
transferred to the substrate.
Hazardous Air Pollutant (HAP):
Hazardous air pollutants, also known as toxic air pollutants, are those
pollutants that are known or suspected to cause cancer or other serious
health effects, such as reproductive effects or birth defects, or
adverse environmental effects. List of HAPs www.epa.gov/ttn/atw/188polls.html
Ink : solid color, or pigment, while suspended in a volatile liquid carrier, such as water or solvent.
Ink Feed System: See Ink Metering System.
Ink Metering System: A system that controls the amount of
ink (or coating) being applied to the substrate so that a thin, even
layer of ink is laid down.
Ink Register: In printing, the alignment of two or more images when printed sequentially on top of each other.
Laten t Heat of Vaporization: The heat absorbed when a substance changes phase from liquid to gas.
MACT: Maximum Achievable Control Technology.
National Pollutant Discharge Elimination System (NPDES):
National Pollutant Discharge Elimination System (NPDES) permit program
controls water pollution by regulating point sources that discharge
pollutants into waters of the United States.
Nip: Line of contact between two Rolls.
Perc alternative solvent (PAS): A non-chlorinated, safer
solvent used for flexographic plate making in place of
perchloroethylene, a known carcinogenic chlorinated solvent.
Perchloroethylene (PERC, PCA): Perchloroethylene is a
historically common solvent used in flexographic plate making. Perc is a
chlorinated solvent known to be a carcinogen and is regulated by the
U.S. EPA as an air toxic or HAP.
Phenolic powder: Phenol-formaldehyde powdered plastic
Photopolymers: Compounds which polymerize on exposure.
Used to coat printing plates. Once polymerized the coating produces
tough abrasion-resistant plates capable of long runs especially when
baked in an oven after processing.
Publicly Owned Treatment Works (POTW): A waste water treatment plant. Typically operated by a municipality or a contractor to the local government agency.
Still bottoms: The residue remaining in a solvent still
after the solvent portion has been evaporated and decanted off. The
contaminants in the original fluid.
Ultraviolet (UV) Coatings: UV-curable coatings, printing
inks and adhesives contain highly reactive molecules. When they are
exposed to ultraviolet light the curing reaction takes place
instantaneously. The exposure time, and thus, the curing time is much
less than a second.
Volatile Organic Compound (VOC): VOCs are precursors to ozone air pollution, a health hazard. Also known as VOM
Volatile Organic Material (VOM): Volatile Organic Material. Also known as VOC.
Web Inspection Device: Using electromechanical devices,
via laser scanners and photo transistor detectors, or CCD cameras web
inspection devices allow printers to mechanically inspect the web of
printed substrates for defects of less than a millimeter while
maintaining full production speeds.