Hourglass

Glass for the hourglass is the same material as that used to make glass in general, and the process of forming a glass circumference is by using a machine that serves to blow air. Both on the shape of the glass and the neck joint of the two glasses.
As for the frame or the hourglass house formed in accordance with the wishes of the designer. The most common raw materials consist of fine wood pieces made by carving in certain styles, decorations, designs and themes. Bamboo, resin, and various metals such as brass, copper and tin are also beautiful frame materials. Customized hourglasses are made in small quantities, as raw materials are purchased or available in limited quantities. Sometimes customers provide their own materials to create an hourglass. The sand used for the hourglass in antiquity is very fine marble dust, because not all sand can be used as an hourglass media. With a rough and uniform shape will be difficult to flow when through the neck of a glass. While at this time the sand used is not a sand but the ballotini (small round glass beads such as miniature marbles measuring 40-160 microns) and can flow smoothly through the glass. In addition, ballotini can be made in various colors so that sand can be selected according to the decor of the room.