保管橡胶很困难;它既不能遇高熟,又不能耐寒。管理中稍有不慎,不是破裂,就是表面溶化或粘边。有一次,我无意中把一塊擦像皮与市售的樟脑塊放在一起,第二天橡皮的表而就溶化成溶胶状,并有粘国性。后来我曾设法使其恢使原献,仇采成功。 It is very difficult to keep the rubber; it can neither encounter high temperature nor cold resistance. Management inadvertently, not broken, is the surface melting or sticky edge. Once, I inadvertently put an eraser with a commercially available camphor block, and the next day the eraser melted into a sol and sticky. Later, I tried to make it back to its original merits.