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A laundry symbol, also called a care symbol, is a pictogram indicating the manufacturer's suggestions as to methods of washing, drying, dry-cleaning and ironing clothing. Such symbols are written on labels, known as care labels or care tags , attached to clothing to indicate how a particular item should best be cleaned.
Modern dry cleaning machines use a closed-loop system in which the chilled air is reheated and recirculated. This results in high solvent recovery rates and reduced air pollution. In the early days of dry cleaning, large amounts of perchloroethylene were vented to the atmosphere because it was regarded as cheap and believed to be harmless.
Ideally printers would prefer not to use it, but it remains the only practical way to ensure a stack of printed paper at the end of a printing press does not set-off. In recent years there has been an emergence of printing presses which use inks that are cured (dried) with powerful UV lamps. As each sheet is individually dried there is no need ...
Paper (typically pages from old phone books) may be used for a final wipe of the lightest areas of the image. Some printmakers will use their bare hand instead to wipe these areas. Once the desired amount of ink is removed, the plate is run through an etching press along with a piece of dampened paper to produce a print.
Offset printing is a common printing technique in which the inked image is transferred (or "offset") from a plate to a rubber blanket and then to the printing surface. When used in combination with the lithographic process, which is based on the repulsion of oil and water, the offset technique employs a flat (planographic) image carrier.
"Cleaning" a negative of unwanted artifacts (noise) from the line camera process, (lines, etc., from the edges of traditional hot-wax analog "font" paste-up, and dirt), would be done by scraping the exposed emulsion from the negative with an X-Acto Knife (for areas intended to be exposed on the printing plate).
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The image is then transferred onto a sheet of paper by pressing the two together, usually using a printing-press. Monotypes can also be created by inking an entire surface and then, using brushes or rags, removing ink to create a subtractive image, e.g. creating lights from a field of opaque color.