SanDIY casting, attempt 2。

I have learnt that Delft clay is a substance that is like a sand mixes with oil, so I mixed the silica sand with oil this time - without the clay powder.

沙／砂模鑄造第二試。Delft clay是金工沙／砂模鑄造使用的一 種……油性「土」，是一種類似沙／砂與油混合的物質。於是這次我用油取代水，開模。

 

I made a proportion of 10:2, silica sand and oil for the fist try, and the mixture was too greasy and it slipped down from the aluminium ring. Oops.

第一次我沒有加黏土粉，而是把黏土粉的比例給了油，因為它是「沙／砂＋油」的組合（偏執），所以矽砂：油是10：2。結果就是沙／砂模整個從模型裡滑下來。NG。

第二次以之前的比例（矽砂：黏土粉：油＝10：1：1）加入黏土粉混合。沙／砂模沒有從上模型裡滑落，倒是與下模型裡的沙／砂黏住。

看來，黏土粉與油的合作關係，並沒有與水那樣好。

待續。

I then went back to the formula with silica sand, clay powder, and oil, which in a proportion of 10:1:1. As shown in the photo, I presume that oil may not be a good friend as water to clay powder.

To be continued.