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绘图用的磅纸成本很高,每公尺单价约与每公尺花大昵(棉布)的单价相等,且此种磅纸国产不多,以前使用的大部是进口商品,常常采买不到,所以对此种磅纸的节约是特别有意义的。由于不小心弄脏之磅纸及画错或使用完了之图纸(背面),都可以用水将他洗浄,再加以使用。洗滌方法简单迅速,兹介绍如下: 把图纸阴湿平铺在清洁之图板上,要洗之面向上,用刷铅油用的猪鬃扁刷浸水沾以肥皂,在纸面上轻轻涂沫,待肥皂涂匀纸面之后,再用刷往返刷洗(刷的时间不能过久,否则将把图纸刷
The cost of drawing paper is very high. The unit price per meter is about the same as the unit price per meter of large flower (cotton cloth). This kind of paper is not made in large quantities. Most of the products used in the past were imported goods, and they are often not purchased. Therefore, the saving of this type of paper is particularly meaningful. Because of the accidental soiling of the pounds of paper and the drawing of the wrong or used drawings (on the back), they can be washed with water and used. The washing method is simple and rapid. It is described as follows: Lay the sheet on the clean drawing board and wash it up. Use a bristle flat brush with lead oil to soak in water and apply soap. Apply lightly on the paper. After the soap has been coated with the paper, brush it again and again (brushing time should not be too long, otherwise it will brush