Materials with hardness not exceeding three can be printed?
Yang Yuan had previously looked at a hardness chart representing materials.
That is:
If talc's hardness is one, then gypsum's hardness is two, calcite is three, fluorite is four, apatite is five, feldspar is six, quartz is seven, topaz is eight, corundum is nine, and diamond is ten.
So, in this sense, the hardness of these three points is quite basic, probably even ordinary metals can't be printed.
Yang Yuan had anticipated this, as he didn't plan on using the basic version to print high-quality materials anyway.
