Hello,
Thank you for contacting us with your query. In general the best route for you to take is to contact the manufacturer for the specific glass you are trying to melt, as glass may have different melting points depending on the ingredients in the batch. You may wish to consult All About Glass https://www.cmog.org/research/all-about-glass, it contains a variety of articles on glass including glass chemistry.
Best of luck in your search
