reason for beer changing color?

[zodiak3000]

i few batches ago i did keg to bottle transfers using this method-



worked great and have been using this method for over a year. heres the thing, the SRM of my DIPA was around 6.7. i noticed after crackin open a 1 month old bottle the color changed significantly (to about 9 SRM), some of the flavor as well. the beer was beautiful before, then turned to what looked like sewer water. what is the cause of this? oxidation?

i just kegged another DIPA, same grist. its been about 3 weeks in keg and i noticed the color on this one has changed as well. no keg to bottle transfers yet! id say this is about 8 SRM. flavor slightly astringent, what does not taste like hop astringency. pretty sure its not infected. what could be the cause of this? when i transferred to keg i put a muslin bag over the end of the siphon to catch as hop material that would flow into the keg. never had problems with this before. i did bleed the head space as well when kegged.

 

[Reno_eNVy]

Could it be that your beer wasn't completely clear? Because yeast dropping out definitely makes beer look darker.

 

[zodiak3000]

Could it be that your beer wasn't completely clear? Because yeast dropping out definitely makes beer look darker.

nah, i dont think its yeast. really wish i had some before and after pics to show.

 

[iambeer]

Can you describe the color change? Is it just the dark light gradient or is it also color changing?

 

[zodiak3000]

Can you describe the color change? Is it just the dark light gradient or is it also color changing?

tough to say. lets picture a 6.7 SRM DIPA, something along the lines of stone ruination or a pliny. after a bottle transfer it really looks like dirty water or something. it might in fact be the same color when held to the light, but looks terrible sitting. i laughed at my BJCP notes from world beer cup because they said it was a little too dark for style. i thought they judged the wrong beer. then i cracked one that was a month old i was surpised. the thing is, this never happened before. maybe a need a new party nozzle/tubing on my keg? this one in the keg now looks fine, just darker than it was 3 weeks ago.