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Full-face elastomeric respirators generally seal better. [2] For substances hazardous to the eyes, a respirator equipped with a full facepiece, helmet, or hood is recommended. [35] Eyeglasses can clash with elastomeric masks. Conventionally, full-face masks are modified, with prescription lenses inserted into the mask.
An N95 respirator is a disposable filtering facepiece respirator or reusable elastomeric respirator filter that meets the U.S. National Institute for Occupational Safety and Health (NIOSH) N95 standard of air filtration, filtering at least 95% of airborne particles that have a mass median aerodynamic diameter of 0.3 micrometers under 42 CFR 84, effective July 10, 1995.
Liquid masks are preferred where precision is needed; they prevent paint from seeping underneath, resulting in clean edges. Care must be taken to remove them without damaging the work underneath. Latex or other polymers; Molten wax; Gesso, typically a substrate for painting, but can also be applied to achieve masking effects
High Humidity reduces mechanical damage such as brittle paint but raises the risks of biological organisms, e.g. white efflorescence and green-to-black stains on a panel painting. [12] High Humidity also raises the risks of curving or warping of the wood over time, forcing the paint to flake off.
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A fine example of Egyptian repoussé is the mummy mask of Tutankhamun, a Pharaoh of the late Eighteenth Dynasty. The majority of the mask was formed using the technique of repoussé from what appears to be a single sheet of gold. The lapis lazuli and other stones were inlaid in chased areas after the height of the form was completed.
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