Discoloration Issue On iPhone 4′s Retina Display Disappears After Bonding Agent Dries Up?
Several users have been reporting issues with discoloration on their newly purchased iPhone 4 unit.
We have now learned that this issue could be due to a bonding agent that is used in the manufacturing process. This chemical is used to secure the iPhone 4 screen and it is suspected that the discoloration is primarily because the bonding agent may not have dried completely as yet. An AppleInsider forums member who claims to be an expert writes:
"Apple is using a bonding agent called Organofunctional Silane Z-6011 to bond the layers of glass. 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.
How do I know? I was involved in pitching Z-6011 to Apple."
Apple has not issued a statement in this regard so far and so it is not possible to verify the authenticity of these claims. However, some users have revealed that the discoloration in fact appears to be disappearing with usage:
"Picked up my iphone today, took me a good hour before i noticed i had a yellow blotch in the lower left of the screen, about where the left of the unlock slider is. Read this, pumped up my brightness to max, and continued to use it, it appears to fading down already, admittedly mine was fairly small in the first place in comparison to some i have seen, but this solution at least appears to be working for now."
Another reader at the MacRumors forums writes:
"I had major yellow spots on the bottom corners of the iPhone 4 this morning when I received it (as shown in the other thread) and as of right now they have COMPLETELY faded away. I have no idea what caused this but it happened. So keep an eye on it over the next day or so if you have the issue. . . It just seemed like the more I used the phone today the more it faded. It's really odd but I'll take it."
Given these forum comments, I would recommend users who are facing the discoloration issue to hold on for a few more days before going in for a replacement. Gizmodo writes that users who have called up Apple for support are being offered conflicting suggestions. While a few Apple technicians have conceded that the discoloration is in fact due to a "residue from the manufacturing process" that should resolve by itself in a few days, other Apple Store employees have agreed to provide a replacement.
We wonder if this anything to do with the fact that some iPhone 4's were delivered one or two days before the official launch day.
Have you been observed this issue on your iPhone 4? Let us know in the comments.
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