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User austingaijin on the AppleInsider forums said today that theyw ere involved in pitching the Z-6011 bonding agent to Apple that is found in the iPhone 4. The material is used to bond the layers of glass in the device during the assembly of the hardware.
"Apple is using a bonding agent called Organofunctional Silane Z-6011 to bond the layers of glass," austingaijin wrote. "Apparently, Apple (or more likely Foxconn) is shipping these products so quickly that the evaporation process is not complete. However, after one or two days of use, especially with the screen on, will complete the evaporation process and the yellow 'blotches' will disappear."
Users began to report on Wednesday that the Retina Display on their new iPhone 4 has a discoloration in the bottom corners of its screen. On those affected units, the screen's corner has a warm yellowish tint to it.