Balance the relative humidity of the pressroom compared to the relative humidity of the paper to be printed. Relative humidity is a measure of how much moisture air or paper can hold versus how much it is actually holding at a given temperature. Before printing a job, the printer must "cure" the paper by letting it sit, wrapped, in the pressroom for a determined amount of time. This will bring the paper to the same temperature and humidity as the pressroom, helping to prevent several printing problems. For instance, ink on cold paper takes longer to dry than ink on room-temperature paper. Ink on dry paper may "chalk" if the dry paper absorbs the liquid in the pigment before the solid pigments adhere to the paper. Paper with too much humidity will expand, causing it to wrinkle on press. This can cause misalignment and a lack or registration in the printing.
The amount of water vapor in the air divided by the amount of water vapor at saturation, expressed as a percentage. 100 percent humidity denotes saturated air. Warm air can hold more moisture than cold air, so for a given amount of water vapor, the higher the temperature, the lower the relative humidity.
how much moisture is in the air compared to how much moisture the air could possibly hold at that temperature; written as a percent; i.e., 95% relative humidity.
The proportion of actual vapor pressure of air to its saturation vapor pressure at that temperature.
This is the amount of moisture in the air represented as a percentage of the maximum moisture carrying capacity of the air at a given temperature. Warmer air can hold more moisture. Relative humidity is important because it affects the stability of wood flooring. Extremes in relative humidity translate to excessive seasonal movement in solid wood flooring and a high degree of internal stress in engineered wood flooring. Wood, people, and most living things are the most comfortable in a relative humidity of 35 – 65%. Most wood flooring manufacturers set limits on RH to ensure the best performance of their product and to honor the warranty.
Measure of air moisture. See Humidity.
Relative humidity is a measure of the amount of moisture in the air. It is expressed in a percentage of how much moisture the air could possibly hold. The "wetter or damper" the air feels the higher the relative humidity. The drier the air feels the lower the relative humidity.
The ratio of the quantity of water vapor present in the atmosphere to the quantity which would saturate it at the existing temperature.
The amount of water vapor in the air expressed as the ratio between the measured amount and the maximum possible amount (the saturation point at which water condenses as dew).
The ratio of the mass of water vapor present in a unit volume of gas to the maximum possible mass of water vapor in unit volume of the same gas at the same temperature and pressure.
The amount of water present in the air at a given temperature in proportion to its maximum water holding capacity at that temperature.
an expression of how much moisture is in the air as a percentage of the total moisture the air can contain at the current temperature. For example, if the air has all the water vapor that it can contain at a given temperature, the relative humidity is 100%; if the air has only half of the vapor that it can contain at a given temperature, the relative humidity is 50%.
The amount of water vapor in the air, expressed as a percentage of the total amount of water vapor that the air could hold at that temperature if saturated.
(RH) is an expression of the moisture content of a given atmosphere as a percentage of the saturation humidity at the same temperature. Seasonal variations in absolute humidity combine with swings in temperature to shift the relative humidity value much more widely in cold storage rooms than in environmental rooms, where the temperature variable is closely controlled.
The amount of water vapor currently in the air compared to the maximum amount of water vapor it can hold at that temperature. Relative humidity is therefore calculated as a percentage.
Relative humidity is the ratio of the partial pressure of water vapour in air to the saturation vapour pressure of water at the same temperature, expressed as a percentage.
The amount of moisture in the air is measured as a percentage of the total amount of moisture the air can hold at a particular temperature. This is known as relative humidity. The ideal relative humidity for a home is between 35% and 45%, too much above or below these levels problems can begin to occur.
The amount of water vapor present in the air as compared to the maximum potential amount.
The ratio (%) of the amount of moisture in the air compared to what it could hold if saturated at the temperature involved.
The mass of water vapour actually contained in a given volume of air expressed as a percentage of the maximum mass of water vapour that could be contained in that same volume at the same temperature.
Amount of water vapor in a certain mass of air, expressed as a percentage of the maximum amount it could hold at that temperature. Compare absolute humidity.
Actual vapour pressure/saturated vapour pressure expressed as a percentage. A measure of the degree of saturation of the air with water vapour
Very roughly, the dampness of the air; more correctly, the percentage saturation of the air with water vapor; better still, the mass of water vapor per unit volume of air as a percentage of the same measure for saturated air at the same temperature.
Ratio of the quantity of water vapor present in the air to the greatest amount possible at a given temperature (expressed as a percent).
The amount of moisture in the air compared with the amount of moisture the air can hold.
Refers to the ratio of the actual vapor pressure of the air to the saturation vapor pressure.
the percentage of the amount of moisture in the air relative to the moisture it can hold without saturation
The amount of water vapor (vapor pressure) in the air divided by the maximum amount of water vapor the air could contain at a given temperature before it would begin to condense into water droplets. Sometimes referred to as "RH".
EXPRESSED AS A PERCENTAGE, THIS IS A COMPARISON OF WATER IN THE AIR COMPARED TO THE AMOUNT OF WATER THAT AIR MASS CAN ACTUALLY HOLD. THIS IS ONE OF THE DETERMINANTS OF WHETHER CONDENSATION CAN FORM ON A WINDOW.
The ratio between the actual amount of moisture in the air and the amount of humidity if the air was saturated expressed as a percentage.
Relative humidity describes the amount of water in the air compared with how much the air can hold at the current temperature. Example: 50% relative humidity means the air holds half the water vapor that it is capable of holding; 100% relative humidity means the air holds all the water vapor it can. At 100% humidity, no more evaporation can occur until the temperature rises, or until the water vapor leaves the air through condensation. Absolute humidity is the ratio of the mass of water vapor present in a system of moist air to the volume occupied by the mixture, that is, the density of water vapor.
The moisture content of the air in relation to the total moisture the air can hold at a given temperature.
The ratio of the amount of water vapor actually present in air compared to the amount of vapor that the air could maximally hold at a given temperature and pressure.
The ratio expressed as a percentage of the amount of moisture air actually contains to the maximum amount it could contain at that temperature. A unit of measurement of resistance to heat flow in hr. ft2 ° F/BTU.in.
The amount of moisture the air can hold at any given temperature compared to the amount of moisture it could hold at any given temperature.
Ratio (in percent) of actual amount of water vapor in a body of air to the maximum amount that body can hold at a given temperature. Relative humidity varies with temperature for a given amount of water vapor.
The ratio, expressed as a percentage, of the actual vapour pressure to the saturation vapour pressure.
A percentage that compares the amount of moisture in the air to the amount of moisture the air can hold at that temperature.
At a given ambient air temperature, the dimensionless ratio between the actual vapor pressure of air to the saturation vapor pressure. Corresponding ratios of mixing ratio can be substituted. Relative humidity is usually expressed as a percentage.
The ration of how much moisture the air actually holds at a particular temperature compared to how much it could hold.
The scientific method for expressing the amount of moisture in air. It is expressed in percentage and is an indication of the proportional amount of moisture that could be absorbed or held at that temperature.
The amount of water vapour in the air, expressed as a percentage of the maximum amount required to saturate it at the same temperature. Ratio of actual water vapour pressure to saturation vapour pressure. See also VAN'THOFF'S RULE.
A measure of the moisture content of the air expressed in percent.
The percentage of humidity in the air, relative to the maximum amount that the air can hold (saturation) at the current temperature.
Ratio of (difference between) the amount of water vapour present in the air to the greatest amount possible at the same temperature.
The amount of water vapor in the air compared to the maximum amount that the air can hold at that temperature, expressed in percentage.
Percentage ration of the actual vapour pressure in the air to the saturation vapour pressure with respect to water at the same temperature and pressure.
The ratio of water vapor in the air to the air's water vapor capacity.
The relative amount of moisture in air expressed as a percentage of the total amount of moisture the air can hold, varies with the temperature and air pressure. (Lull, 92)
the amount of water vapor in the air as compared to the percent of the amount of water vapor it would take to saturate the air.
The percentage ratio of vapour pressure in the atmosphere compared to the saturated vapour pressure at that temperature
A ratio comparing the amount of water vapor present in the air to the amount which saturated air would hold at the same temperature.
Dampness in the air is measured as the percent of water vapor in the air at a specific temperature relative to the amount of water vapor that can be held in a vapor form at that specific temperature.
The amount of water vapor actually in the air, compared to how much water vapor the air can hold, expressed in percent.
Ratio of the quantity of water vapor present in the air to the quantity which would saturate it at any given temperature.
The amount of water vapor actually in the air divided by the amount of water vapor the air can hold. Relative humidity is expressed as a percentage and can be computed in a variety of ways. One way is to divide the actual vapor pressure by the saturation vapor pressure and then multiply by 100 to convert to a percent. Click here for text explaining this in more detail.
The amount of water vapour present in the atmosphere expressed as a percentage of saturation, measured with a hygrometer.
The ratio of the actual water vapor pressure of the air-water vapor mixture to the saturation water vapor pressure, stated as a percent (dimensionless).
The ratio of the amount of water vapor actually in the air compared to the amount of water vapor the air can hold at that particular temperature and pressure.
Weight of water vapor in the air divided y the weight of water vapor in completely saturated air at the same temperature, expressed as a percentage.
The ratio of water vapor contained in the air compared to the maximum amount of moisture that the air can hold at that particular temperature and pressure.
A measure of the moisture content of the air at a given temperature in effect the ratio of the water vapour pressure to the saturated water vapour pressure. It is expressed as a percentage.
Ratio of the amount of water vapor in air at a specific temperature to the maximum capacity of the air at that temperature.
humidity is a state of (usually invisible) moisture in the air; relative humidity (RH) is the amount of moisture in a given volume of air as compared to the amount that it is capable of holding, and measured as a percentage; if the RH is 30 percent, that means the air is holding 30 percent of the moisture it is capable of holding; as air temperature increases, so does the air's capacity to hold moisture; if the air temperature rises and its moisture content (humidity) stays the same, then the relative humidity becomes a lower percentage; when the temperature inside a building is raised, as so often is the case in the winter, the RH indoors will drop; the only way to re-establish the proper RH is to add moisture to the air (the function of a humidifier).
A weather term. The amount of moisture in a given parcel of air expressed as a percentage of the maximum amount that parcel of air could hold at the same air temperature.
The amount of water vapor in the air as compared to what the air can hold at saturation.
The relative humidity of an air/water vapour mixture is the ratio of the vapour pressure existing to the saturated vapour pressure for the same dry-bulb temperature.
A type of humidity that considers the ratio of the actual vapor pressure of the air to the saturation vapor pressure. It is usually expressed in percentage.
The amount of moisture in the air measured as a percent of the maximum amount the air could hold at any given temperature.
Humid air contains moisture which helps to dissipate electrostatic charges and reduce charge buildup by increasing surface conductivity. High relative humidity will reduce charge formation, but will not prevent static charge buildup and discharge. Ionized air can also be used to dissipate static charges, either with or instead of high relative humidity. Go back to the MENU Go to END
The amount of moisture contained in the air as compared to the amount the air could hold at that temperature.
The relative difference between the amount of water vapor in the air and temperature. If water vapor remains the same, RH will decrease as temperature increases because warmer air can hold more water.
The amount of water vapor in the air, compared to the amount the air could hold if it was totally saturated. (Expressed as a percentage).
The ratio of the vapor pressure to the saturation vapor pressure with respect to water. This quantity is alternatively defined by the World Meteorological Organization as the ratio of the mixing ratio to the saturation mixing ratio. These two definitions yield almost identical numerical values. Relative humidity is usually expressed in percent and can be computed from psychrometric data. Unless specified otherwise, relative humidity is reported with respect to water rather than ice because most hygrometers are sensitive to relative humidity with respect to water even at subfreezing temperatures, and because the air can easily become supersaturated with respect to ice, which would require three digits in coded messages for relative humidity with respect to ice.
The ratio of the amount of moisture in the air to the amount which the air could hold at the same temperature and pressure if it were saturated; usually expressed in percent.
The amount of water in the air relative to the maximum amount of water that the air can hold at a given temperature.
The ratio of the amount of water vapor in a volume of air to the greatest amount of water vapor that could be in the same volume of air at the same temperature and pressure expressed as a percent. (source: ASHRAE F97)
The ratio of the actual water-vapor partial pressure to its saturation pressure at the same temperature. (considered only with atmospheric air). ( 010)
The ratio, expressed as a percentage, of the amount of water vapor present in a given volume of air at a given temperature to the amount required to saturate the air at that temperature.
Percentage relation that the actual amount of water vapour present in the given volume of air at a definite temperature bears to the maximum amount of water vapour that would be present if the air were saturated with water vapour at that temperature.
The ratio of the amount of moisture in the air, to the maximum amount of moisture that air would contain if it were saturated. The ratio of the actual vapor pressure to the saturated vapor pressure.
Relative humidity (RH) may be defined as the amount of moisture in the atmosphere as compared with that of complete saturation at a given temperature. Water exposed to air gradually evaporates until it reaches a saturation point, i.e. 100% humidity. At 21 degrees centigrade (approx. 70deg F) and a normal atmospheric pressure, the amount of evaporated water is approximately 11 grams per cubic meter at a RH of 70%. Note: DO NOT confuse relative humidity with absolute moisture content
the ratio of the amount of moisture in the air to the maximum amount of moisture the air could hold under the same conditions; usually expressed as a percentage
The ratio of the amount of water vapor in the air compared to the amount of water vapor the air (at a certain temperature) can hold
The ratio of water vapor present in air to the highest amount possible at the same temperature.
The percent of moisture in the air compared to the amount of moisture the air could contain. This is the most common reading to be reported in the weather reports. The report of “100 degrees and 12% relative humidity (RH)†is the same as all the above examples. Using the analogy of a glass half filled with water means the glass is 50% full. It could hold an additional 50% at which point it would start to overflow if more water was added.
a measure of the water vapor content of the air at a given temperature; the amount of moisture in the air as compared with the amount that the air could contain at the same temperature, expressed as a percentage
A measure of the amount of water vapor actually held by a specific volume of air in comparison to the maximum water vapor that air could hold at a constant temperature.
A dimensionless ratio, expressed in percent, of the amount of atmospheric moisture present relative to the amount that would be present if the air were saturated. Since the latter amount is dependent on temperature, relative humidity is a function of both moisture content and temperature. As such, relative humidity by itself does not directly indicate the actual amount of atmospheric moisture present. See dew point.
The amount of moisture in a volume of air as a percentage of the maximum amount of moisture which can be held in that air at a certain temperature - cold air can't hold as much moisture as warmer air.
The ratio of the existing amount of water vapor in the air at a given temperature to the maximum amount that could exist at that temperature. Usually expressed in percent.
At a given temperature this is the amount of moisture in air as a percentage of the maximum moisture carrying capacity of the air, i.e. the water vapour pressure as a percentage of the saturated water vapour pressure.
The ratio of the partial pressure of a vapor to the vapor saturation pressure at the dry bulb temperature of a mixture.
The ratio, expressed as a percent, of the quality of water vapor actually present in the air to the greatest amount possible at a given temperature.
The ratio of the ambient vapor pressure of water to the saturated vapor pressure at the particular temperature. It is usually calculated with respect to liquid water even when the temperature is below the melting point.
The amount of water vapor present in the atmosphere, expressed as a percent of maximum that could be present at the same room temperature.
The amount of water vapour in a volume of air expressed as a percentage of the total water the air can hold at that same temperature. For most archival purposes a stable RH of 40-50% is desired.
The ratio of the partial pressure of water vapor in an air parcel to the saturation pressure (usually over a liquid unless specified otherwise).
The ratio of water vapor in the air to the maximum amount of vapor the air can hold at a given temperature and pressure. Fire behavior is dependent on, and can be predicted from, relative humidity.
The ratio of the amount of water vapour required for saturation (at a particular temperature and pressure). The ratio of the air's actual vapour pressure to its saturation vapour pressure.
The percentage of moisture in the air in relationship to the amount of moisture the air could hold at that given temperature. At 100 percent relative humidity, moisture condenses and falls as rain.
Water vapour in air compared with the amount of water vapour held at the same temperature when saturated
The ratio of water vapour in the air at a given temperature to the maximum amount which could exist at that temperature. It is usually expressed as a percentage
The amount of water vapor in the atmosphere, expressed as a percentage of the maximum quantity that could be present at a given temperature; the actual amount of water vapor that can be held in space increases with the temperature
the ratio of the amount of water in air to the maximum amount that the air can hold
The percentage of moisture contained in air as compared with that required to completely saturate it at a given temperature. A low relative humidity of around 40% is considered ideal for paper storage, but is very difficult to achieve in the humid tropics. Mould growth becomes a serious problem above 70% relative humidity.
The amount of water vapour present in the atmosphere expressed as a percentage of the maximum that could be present at the same temperature.
The amount of water vapour contained in the air at a particular temperature compared with the total amount of water vapour the air can contain at that temperature. Relative humidity-RH-is expressed as a percentage. Various materials respond differently over a range of humidity levels and there is an optimum level of relative humidity suitable for the display and storage of specific materials. The suggested RH for a mixed collection would be in the range of 45-55%.
Ratio of actual water vapor present to the amount contained in saturated air - expressed as a percentage.
Ratio of the amount of water vapor present in the air to that which the air would hold at saturation at the same temperature.
The measurement of the amount of moisture in the atmosphere.
The ratio of the amount of water vapour actually contained in a volume of air at a specific temperature and pressure, to the maximum amount possible under these conditions; normally expressed as a percentage.
the ratio of the current amount of vapor in the air to how much vapor the air can hold at saturation
is a weather element which indicates the ratio between absolute humidity and humidity capacity at a given temperature , usually expressed as a percentage
This is the percentage of water vapor in air at a given temperature as compared to the total amount of water vapor the air could hold at that temperature, expressed as a percentage.
(RH): Quotient of the amount of moisture in air and the amount that would saturate it at the same temperature and pressure, expressed as a percentage.
A ratio of the amount of water vapor that the air is holding to the amount of water vapor the air can hold, which depends on temperature.
The ratio of the quantity water vapor actually present to amount present in a saturated atmosphere at a given temperature; expressed as a percentage. The ratio of the actual vapor pressure of the air-vapor pressure to the pressure of saturated water vapor at the same dry-bulb temperatures time 100.
The ratio of the amount of vapor contained in the air to the greatest amount the air could hold at that temperature. Normally expressed as a percentage.
The ratio between the amount of water vapor in the air and the air's absorption capacity at a given temperature
At any given temperature, a comparison of the actual water content of the air with the amount of water that could be held at saturation.
nbspThe ratio of the amount of moisture in the air at any temperature to the amount required at that temperature to saturate the air. (Dictionary of Paper).
The amount of water vapor in the atmosphere, expressed as a percentage of the maximum amount of water that could be suspended in the air at that given temperature.
The ratio of existing water vapor to that of saturated air at the same dry-bulb temperature.
the ratio of the weight of moisture in a given volume of air vapor mixture to the saturated (maximum) weight of water vapor at the same temperature, expressed as a percentage. For example, if the weight of the moist air is 1 pound and if the air could hold 2 pound of water vapor at a given temperature, the relative humidity (RH) is 50 percent.
The ratio, expressed as a percentage, of the amount of moisture that is present in the air to the amount that can exist in the air at that temperature and pressure.
The ratio of the moisture in the air to the maximum possible moisture level at the current temperature.
The ratio between the measured water content of air and the maximum possible amount of water the air can hold at a given condition.
The percentage of moisture in the air compared with the maximum amount of moisture that air will hold at a given temperature.
A measure of the percent of moisture actually in the air compared with what would be in it if it were fully saturated at that temperature. When the air is fully saturated, its relative humidity is 100 percent.
Measure of the water vapor or moisture in air; can be determined from the wet-bulb and dry-bulb temperature using a psychometric chart.
The ratio, expressed as a percentage of the amount of moisture in the air, to the maximum amount of moisture the air is capable of holding under the same conditions.
The amount of water in a volume of air divided by the amount of water that volume of air could hold in a vapor state at a given temperature. It is expressed as a percentage from 0 to 100.
The ratio of the amount of water vapor in the air compared to the maximum amount that could be present (usually expressed in a percentage); 100 percent is when the air is totally saturated with moisture.
(%) The ratio of the actual amount of water vapor in the air to the maximum it can hold at a given temperature, multiplied by 100.
the (dimensionless) ratio of the actual vapor pressure of the air to the saturation vapor pressure; usually expressed as a percent, and can be computed from psychrometric data.
Relative humidity is a term used to describe the quantity of water vapor that exists in a gaseous mixture of air and water.