Цитата:
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She is very vulnerable: can crumble from the shock, she was dangerous every trip, her disastrous affects the action of direct sunlight, temperature and excessive dryness or humidity.
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As a specialist in working with this material can not, based on their experience, to say that this is not so.
Soft - bed perfectly placed on a smooth surface: cardboard, paper, cardboard, hardboard.
Multi pastels not showered, not displayed in direct sunlight, does not darken, not zhuhnet, does not crack (as opposed to oil).
Oxidation prone paper or cardboard, but now many unoxidizable materials produced on the basis of cotton.
Glass is required solely as protection against external mechanical influences. But, often, the glass needed and oil, and made in other techniques work.
Some samples of works in pastels here
http://www.artlib.ru/index.php?id=11...2&uid=9744