I prefer to have Hei Cast to do casting; there are few casting material for choose that this is the one easy to find at the hobby shop. Hei Cast it’s not cheap but quite stable, it’s not stinking that compare to others, but it needs to ventilate to help the health. Hei Cast come with 2 version which is 90 sec and 180 sec, there are quite challenge when work on it. The 90 sec version needs to try few times to get use to it definitely, because it is solidifying in short period; then can be handle the casting and enjoy it within 90 sec. Once 90 sec version to have in hand that the 180 sec version will be feel just like fish in water.
Some necessary stuff needs to have them for casting:
1.Hei Cast resin.
2. Scales for A.B resin, those two resins needs to be in the same weight by scale.
3. Paper cups are the expendables.
4. Coffee stick for stir the A.B resins.
5. Silicone mold.
I’ll use the paper clip to fold L shape then pick the area where the bubbles to adhere to be, that it must be done in few second before the resin solidify, the bubbles are appears from the facial usually. I think it’s better to find the best way to solve the bubbles problem, like having a vacuum machine.
I prefer to leave it for 1 hour; even it is a 90 sec resin. I cut apart the silicone at the hindbrain which is the safely parts for head, the front and the sides (ears) are not the way to do so; it will cause the mold lines are hard to fix.
Push aside the cut line when resin has solidified complete, take the head out that it’s done!
倒入模子時可以將攪拌棒立著，樹脂順著攪拌棒留入模子裡；在使用90秒Hei Cast時無法有充足時間讓你處理氣泡的問題，也就是說注入Hei Cast時在模子裡的液體多少都會出現氣泡，除非你已經準備了去除氣泡的機器才能解決這問題．所以翻製出來的物體表面如有氣泡而唯一的方式就是以補土填補了；而180秒就能利用一點點時間做氣泡去除的動作，我通常使用粗的迴紋針摺成L型而在模子裡的液體倒入3/2時將容易堆積氣泡的地方挑一挑，讓氣泡往上跑，然後再倒入剩餘的部位。