All Green Heart Balloon Mold. Unique wall art - Industrial factory salvage used to create extraordinary texture and a timeless look. The balloon molds make for some unique wall art and are a great size. Use as a stand-alone or together with other similar-sized wall hangings. Molds are dusted green. The head-on view is a little gray-looking. Manufacturing of balloons took place by coating the spindle pegs with powder, then dipping them into hot latex and baking. Once dried the balloon was peeled off.