Definition of Terms
Dose - irradiance integrated over time, or Irradiance (W/cm
2
) x Time (s) = Dose (Joules/cm
2
).
NOTE: Watt is the power that gives rise to the production of energy at the rate of 1-joule (J) per second (s).
Flood-Lamp System - set of components arranged to generate, collect, condition and direct UV radiant
energy to perform curing of engineering adhesives, coatings, and inks within a safe and controlled process.
It includes a lamp housing and power supply and may also include a shutter, workstation, UV enclosure,
Dymax light shield, and/or accessories.
Intensity - a measure of light energy over the unit of surface area (usually the surface at the specified
working distance from the bottom of the reflector housing) in W/cm
2
or mW/cm
2
.
Lamp - light source (bulb or burner) generating ultraviolet, visible, and infrared radiant energy from
burning matter stimulated by electrical power conditioned by a proper power supply which is an integral
part of a lamp. A light source is usually placed into a reflector (of various geometry) to increase light
source efficiency by collecting and directing radiant energy of selected spectra (for a given curing process).
Ozone - oxidizing agent (O
3
) produced by the action of ultraviolet radiant energy (below 185 nm) or
electrical corona discharge of oxygen on air.
Ultraviolet (UV) - The invisible region of the spectrum just beyond the violet end of the visible region.
Wavelength ranges in general from 1.0 to 400 nm. Dymax lamps (bulbs) do not radiate energy in deep
ultraviolet; there are very minute amounts below 220 nm and practically nothing can be sensed below 200
nm. This is due to the use of ozone-blocking quartz bulb envelope (See Ozone).
Ultraviolet is used beneficially in various fields of industry and medicine. In order to standardize light
sources used in medicine, the International Congress on Light, in Copenhagen in 1932, recommended
dividing the ultraviolet spectrum into three spectral parts:
Ultraviolet A (UV-A) - UV of long wavelength from within approximately 400 to 320 nm of the
spectral band (4000 to 3200) - predominately produced by Dymax flood lamps.
Ultraviolet B (UV-B) - UV of medium wavelength from within approximately 320 to 280 nm - Dymax
flood lamps produce some amount of their energy within this bandwidth.
Ultraviolet C (UV-C) - UV of short wavelength below 280 nm (we say from 280 to 200 nm) - a large
amount of this energy is present in the sunlight.
Cautionary Statements Are Defined As:
Warning - is used when there is a hazardous situation that has some probability of severe injury.
Caution - is used to indicate a hazardous situation that may result in minor or moderate injury.
Notice - is used to convey a message related directly or indirectly to the safety of personnel, or
protection of property.
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