Цитата:
Сообщение от tandem
Check the ink ( black ink , gouache , watercolor ) very easily . We must take a tablespoon a paper napkin , folded it so as to obtain the elastic sharp corner , very lightly moisten it and akkkuratno to the surface of a picture in the peripheral part of it . If the napkin will be barely noticeable black mark , it means the image of a no- print .
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Thank you ! Yet I dare not )) )