White glass container and method of producing white glass container

A method of manufacturing a white glass container having a three-layer structure which is derived from a phase separation phenomenon of a glass composition and which includes a white transparent layer having relatively low whiteness, a white opaque layer having relatively high whiteness, and a white transparent layer having relatively low whiteness, the method comprising:

• a first process of preparing a glass composition having the following glass blending composition on the basis of the total amount, and melting the glass composition,
• SiO2:
• 45% by weight to 58% by weight,
• P2O5:
• 2% by weight to 8% by weight,
• Al2O3:
• 5% by weight to 9% by weight,
• B2O3:
• 5% by weight to 13% by weight,
• Na2O:
• 5% by weight to 12% by weight,
• K2O:
• 1% by weight to 6% by weight,
• ZnO:
• 3% by weight to 10% by weight, and
• CaO:
• 3% by weight to 10% by weight;
• and
• a second process of molding and gradually cooling the glass composition, which is melted, by using a mold and a plunger according to a one-press method to obtain the white glass container having a multi-layer structure derived from the phase separation phenomenon of the glass composition in part or the whole of the white glass container.

A method of manufacturing a white glass container having a two-layer structure which is derived from a phase separation phenomenon of a glass composition, and which includes a white transparent layer having relatively low whiteness, and a white opaque layer having relatively high whiteness, the method comprising:

• a first(′) process of preparing a glass composition having the following glass blending composition on the basis of the total amount, and melting the glass composition,
• SiO2:
• 45% by weight to 58% by weight,
• P2O5:
• 2% by weight to 8% by weight,
• Al2O3:
• 5% by weight to 9% by weight,
• B2O3:
• 5% by weight to 13% by weight,
• Na2O:
• 5% by weight to 12% by weight,
• K2O:
• 1% by weight to 6% by weight,
• ZnO:
• 3% by weight to 10% by weight, and
• CaO:
• 3% by weight to 10% by weight;
• and
• a second(′) process of molding and gradually cooling the glass composition, which is melted, by using a mold and cooling air according to a blow method to obtain the white glass container having a multi-layer structure derived from the phase separation phenomenon of the glass composition in part or the whole of the white glass container.