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  • Bubble-Free Resin Casts with Modified Paint Tank

    Hi all ! I build aircrafts models in 1/72 scale and I use to cast resin parts, sometimes full kits of rare aircrafts. I use pressure casting, and I always pressure cast silicon molds. I would say the molds have to be pressure cast, I first tried pressure resin casting with non de-bubbled molds and I found the resin was forced in the sub-surface air bubbles of the molds, and the parts were covered with pustules...I also tested vacuum de bubbling, the main problem is the need of a vacuum pump, plus a compressor... Vacuum de-bubbling is faster, as pressure degassing of the silicone molds requires to keep the molds under pressure during the 12 hours or more of their curing...Denis

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