تم الإجابة عليه: قد تغطي اللوحات الفنية بطبقة من الورنيش وعندما تتاكل هذة الطبقة يبدا حدوث التفاعلات الكيميائية بين الهواء ومكونات

ج. يتم تغير اللون للوحات وهذا يدل على حدوث تفاعل الكيميائي وتغير اللون يسبب تلف اللوحة

أخر المواضيع من قسم : اسألني

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تم الإجابة عليه: قد تغطي اللوحات الفنية بطبقة من الورنيش وعندما تتاكل هذة الطبقة يبدا حدوث التفاعلات الكيميائية بين الهواء ومكونات

أخر المواضيع من قسم : اسألني