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The main objective of cleaning is to achieve clarity of surface detail. [57] Books and documents may be subjected to different types of cleaning. Conservators may clean dust from paper and leather with a soft brush or cloths, a specialized vacuum cleaner, nonchemical vulcanized rubber sponges, or nonabrasive erasing materials such as vinyl erasers.
Surface cleaning of parchment has been developed after methods used for cleaning paper, with a few key differences related to the structural and chemical properties of parchment. For the most part, chemical treatments are ineffective and some, like hypochlorites and methyl bromide, can denaturalize parchment.
Green cleaning – cleaning methods and products with environmentally friendly ingredients and procedures which are designed to preserve human health and environmental quality; Hygiene – Practices performed to preserve health; Lady Macbeth effect
Cleaning is the process of removing unwanted substances, such as dirt, infectious agents, and other impurities, from an object or environment. Cleaning is often performed for aesthetic , hygienic , functional , safety , or environmental protection purposes.
A college student accused of killing his roommate and another person at a Colorado dorm room last week told his roommate a month earlier he would “kill him” if he was asked to take out the ...
Having not actually witnessed the defendant at the scene, the expert witness can not state for a fact that the sample is a match to the defendant, particularly when the samples were collected at different times and different places by different collectors using different collection methods.
Students taking an assessment. Summative assessment, summative evaluation, or assessment of learning [1] is the assessment of participants in an educational program. Summative assessments are designed both to assess the effectiveness of the program and the learning of the participants.
Self-cleaning glass is a specific type of glass with a surface that keeps itself free of dirt and grime. The field of self-cleaning coatings on glass is divided into two categories: hydrophobic and hydrophilic. These two types of coating both clean themselves through the action of water, the former by rolling droplets and the latter by sheeting ...