Methods for manufacturing glass articles

A method comprising:

• melting, in a melter, a first glass composition comprising a combination of glass constituent components;
• feeding into the melter a second glass composition comprising the same combination of glass constituent components, wherein at least one glass constituent component of the second glass composition has a concentration that is different from a concentration of the same component of the first glass composition;
• drawing at least three glass articles from the melter while maintaining the contents of the melter in a molten state, the at least three glass articles comprising:
• a first glass article comprising the first glass composition;
• at least one intermediate glass article comprising a glass composition that is neither the first glass composition nor the second glass composition;
• and
• a final glass article comprising a glass composition different from the first glass composition;
• wherein:
• the first glass composition and the second glass composition both comprise AlF3,
• a concentration of the at least one glass constituent component in the at least one intermediate glass article is between the concentration of the at least one glass constituent component in the first glass composition and the concentration of the at least one glass constituent component in the second glass composition, and
• the first glass article has a first set of values for a set of properties, the final glass article has a second set of values for the same set of properties, the second set of values being different from the first set of values, and the at least one intermediate glass article has an intermediate set of values for the set of properties that is between the first set of values and the second set of values.