Scattered reports of yellow blotches on some iPhone 4 screens is being attributed to an incomplete evaporation process involving the chemical used to bond layers of the device’s glass. A poster on AppleInsider’s forums claimed to be involved with pitching the chemical to Apple, and he said that the blotches should disappear as the process completes.
“Apple is using a bonding agent called Organofunctional Silane Z-6011 to bond the layers of glass,” wrote a poster named austingaijin. “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.”
He added, “How do I know? I was involved in pitching Z-6011 to Apple.”
Effectively anonymous posters commenting on a forum don’t make for a proven fact, but with the iPhone 4 such a new device and reports of these blotches catching some attention, the comment bears mentioning.