How do they melt the color into the glass?

Answer 1

Glass is colored by adding the ingredients to color it before it is made (melted). Most glass is basically (and usually) silicon dioxide (like sand) with a bit of other stuff mixed in. And the coloring agent, say powdered cobalt (for that deep rich blue) is added to the sand and mixed in before the mix is melted. Presto! Out comes the blue glass. There are different compounds that glass can be made of, and different compounds that will color it. Glass is neat stuff, and there is a lot to see and read at the Wikipedia page on glass. Use the link and check out the pictures as well as a list of stuff that is used to color glass.

Answer 2

A glass is an amorphous solid material. Glass is one the most versatile substances on Earth, used in many applications and in a wide variety of forms, from plain clear glass to tempered and tinted varieties. Glass occurs naturally when rocks high in silicates melt at high temperatures and cool before they can form a crystalline structure. For the best flint-glass, 120 lbs. of white sand, 50 lbs. of red-lead, 40 lbs. of the best pearlash, 20 lbs. of nitre, and 5 oz. of manganese; if a pound or two of arsenic be added, the composition will fuse much quicker, and with a lower temperature.

Answer 3

You have to put it somewhere between 1425-1600 degrees Celsius ( 2600-2900 degrees f).