heat exposure question

Bill Lundstrom

Bill Lundstrom

Bill Lundstrom
when a cork has a thin line of red running from the bottom of the cork to the top, is that indicative of heat exposure or a flaw in the cork?
are red stains kind of irregularly spread about the cork more a definite sign of heat exposure?

I've heard mixed opinions on this over the years. just wondering what the consensus is here.
 
If the cork is good, the sign to watch for that indicates possible heat exposure is a protruding cork.

If the cork is not good, then no general conclusion can result.

If you're seeing the line of red while the cork is still in the bottle, then I'd be inclined to drink that bottle on a somewhat sooner timeline.

. . . . Pete
 
The thin line of wine up the side could be due to a natural vein in the cork or possibly the cork was crimped slightly by the corking machine during bottling.
 
A flaw in the corker one year put those lines in every bottle--over 150 of them--of my home wine. The lines appeared very shortly after I laid the bottles on their sides. I got another corker and re-corked them all.
 
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