读了张松踪同志介绍的香粉塑料,对我们启发很大。我们在去年也曾试用过一种类似的塑料制成了一个鱼脑的模型和一个蛙腦的模型,效果良好。由于这种塑料,在取材上比较简便,现在将制法介绍如下: 塑材和塑坯的准备:把剩余的粉笔头收集起来,捣成灰末。再发动同学,積聚了一些粉笔灰。用薄浆糊或稀薄的牛皮膠水冲入这样灰末中,揉成粘性適度的粉塊(粉塊不要冲得太爛)。再按照需要的厚度、大小、用硬纸(?)其四周在陽光下曝晒(如偶遇干裂,可加以填补)干后即成为很好的塑坯。再用小 Read Zhang Song trace comrade introduced powder plastic, inspired us a lot. We also tried a similar plastic last year to make a fish brain model and a frog brain model, the effect is good. Because of this plastic, in the drawing is relatively simple, the method is now introduced as follows: Plastic and preform preparation: the remaining chalk collection, smashed ash. Then start a classmate, accumulated some chalk ash. With a thin paste or thin leather glue into such ash, knead into a moderate sticky powder (powder should not be washed too bad). Then according to the needs of the thickness, size, with cardboard (?) Around the sun exposure (such as occasional chapped, can be filled) to become a good dry preform. Re-use small