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Degreasing Before making a stencil, the mesh should be degreased with a suitable degreasing agent, unless it has a special surface treatment like e.g. SEFAR PET 1500.
Please do not use household detergents! |
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Deionized water Water that goes through an ion exchange process in which all positive and negative ions are removed. |
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Denier The mass in grams of 9000 m of fiber or yarn.
A direct yarn numbering system to define size of fiber or yarn. The higher the number, the coarser (larger) the yarn. |
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Depth filter A filter medium consisting of randomly distributed particles or fibers resulting in openings having a non-uniform and tortuous path. |
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Differential pressure The difference in pressure between two points of a system, such as between two sides of an orifice. |
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Direct emulsion UV - sensitive Emulsion layer for screen printing stencils |
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Double layer fabric By combining a fine filter layer and an open, coarser mesh layer, these fabrics combine high flow capacity and fine particle capture efficiency with the extremely durable construction needed for large-scale process filtration. |
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Downstream side The side of a product stream that has already passed through a given filter system; portion located after the filtration unit. |
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Dual chamber test method Measures near-field shielding
effectiveness by indicating the signal attenuation caused by passage through a test material. |
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Dutch weave Warp and weft wire diameters are different in size: the weft wires are closer together, thus providing excellent strength and high density. |
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Dyeing The process of adding color to textiles in fiber, yarn or fabric form. |
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Effective area The total area of the porous medium exposed to flow in a filter element. |
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Efficiency The ability, expressed as a percentage, of a filter to remove a specified artificial contaminant at a given contaminant concentration under specified test conditions. |
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Exposing Exposing the photosensitive layer (emulsion) to UV light. The uncovered areas will harden and become water insoluble. The unexposed areas remain water soluble and can be washed out with water. |
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Exposure time Time, the stencil is exposed to UV emission. |
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Extractables Substances that can be leached from a filter during the filtration process or under other specified conditions. |
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Fabric geometry See mesh geometry |
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Farady cage A cage made of conductive material. Static fields and discharges do not pass through it. Electromagnetic energy passing through the skin or shield is attenuated to varying degrees. |
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Feed The material entering a filter processing unit for treatment. |
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Filter cake The solids discharged from a dewatering apparatus. |
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