| 摘要 |
A method is provided for making clear glass having an azure edge coloration and low amber surface coloration in a non-vacuum float glass system. The method includes processing batch materials in a non-vacuum float glass system to provide a final glass product including: <tables id="TABLE-US-00001" num="00001"> <table frame="none" colsep="0" rowsep="0"> <tgroup align="left" colsep="0" rowsep="0" cols="3"> <colspec colname="offset" colwidth="49pt" align="left"/> <colspec colname="1" colwidth="28pt" align="left"/> <colspec colname="2" colwidth="140pt" align="center"/> <THEAD> <ROW> <ENTRY/> <entry namest="offset" nameend="2" align="center" rowsep="1"/> </ROW> </THEAD> <TBODY VALIGN="TOP"> <ROW> <ENTRY/> <ENTRY>SiO<SUB>2</SUB></ENTRY> <ENTRY>65-75 wt. %; </ENTRY> </ROW> <ROW> <ENTRY/> <ENTRY>Na<SUB>2</SUB>O</ENTRY> <ENTRY>10-20 wt. %; </ENTRY> </ROW> <ROW> <ENTRY/> <ENTRY>CaO</ENTRY> <ENTRY>5-15 wt. %; </ENTRY> </ROW> <ROW> <ENTRY/> <ENTRY>MgO</ENTRY> <ENTRY>0-5 wt. %;</ENTRY> </ROW> <ROW> <ENTRY/> <ENTRY>Al<SUB>2</SUB>O<SUB>3</SUB></ENTRY> <ENTRY>0-5 wt. %;</ENTRY> </ROW> <ROW> <ENTRY/> <ENTRY>K<SUB>2</SUB>O</ENTRY> <ENTRY>0-5 wt. %;</ENTRY> </ROW> <ROW> <ENTRY/> <entry namest="offset" nameend="2" align="center" rowsep="1"/> </ROW> </TBODY> </TGROUP> </TABLE> </TABLES> a colorant portion having total iron (Fe<SUB>2</SUB>O<SUB>3</SUB>) of 0-0.02 wt. %, CoO of 0-5 ppm, Nd<SUB>2</SUB>O<SUB>3 </SUB>of 0-0.1 wt. %, and CuO of 0-0.03 wt. %. The glass has a redox ratio in the range of 0.2 to 0.6, and can have a retained sulfur content of less than or equal to 0.2 wt. %, such as less than or equal to 0.11 wt. %.
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