Method of calculating exposure in photographic printing. A range of exposures are given to a strip of paper, from part of the image, this helps judge the correct exposure for the final print. (see Exposure)
Water test strips that measure the most important levels of water quality, acidity, hardness, nitrites and nitrates. Water treatment
A series of test exposures on a piece of printing paper.
a plastic strip with a chemically treated pad, or pads, that can be dipped directly into the water
The test strip is used to find the correct exposure for a pint in the enlarger. Test strips are generally an inch in width and five inches or more in length.
Strip cut from a sheet of photographic paper used to test several different exposure levels before deciding the correct exposure when making a print.
Test strips are available to provide quick indication of coolant quality. Test strips can be used to indicate freeze point, nitrite and molybdate levels, carboxylate levels and coolant pH. All test strip methods can under certain circumstances lead to erroneous readings and should be back by laboratory analysis when in doubt. The carboxylate and pH strips are usually quite accurate, the nitrite and molybdate strips are a bit less accurate and freeze point test strips are not accurate, especially with red or orange dyed coolants. For freeze point use a refractometer designed for coolant testing.
A test strip is used in the print room to find accurate exposures. Test strips typically are exposed a small fraction at a time (1-2 inch intervals) to varying exposure times or aperture settings to determine what is the correct exposure for a given image.
Test strips are used to measure the spa water's pH, alkalinity, chlorine or bromine level, hardness and total dissolved solids.
A strip of printing paper that is given a series of incremental exposure times ( such as 3, 6, 9, 12 seconds ) in order to determine the ideal base exposure time.