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Thread: Strange film on a sealed bottle ?

  1. #1
    Join Date
    Mar 2019
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    York County, New Brunswick
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    Default Strange film on a sealed bottle ?

    I opened one of my sealed mason jars of syrup from last season and it looked like this. Strange grey film on the syrup but the rest of the jar is clear. It smells like maple syrup but I havenít tasted it yet. Anyone else ever experience this ?
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    30 taps on Red and Sugar Maple
    Oil tank evaporator
    simple beginnings

  2. #2
    Join Date
    Jan 2016
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    MA
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    Looks like mold. Likely causes include low density syrup or low canning temperatures. I have found that small jars and bottles need to be preheated before canning because they suck a lot of heat out of the syrup resulting in a low canning temperature and moldy syrup.
    55ish taps on buckets
    D&G Sportsman 18x63
    RB15 RO Bucket
    Stihl 044 and 026

  3. #3
    Join Date
    Jan 2006
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    Oneida NY
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    10,919

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    Can't see it well enough, but it could be mold or even defoamer. If defoamer, you used too much. Pick it out with a spoon, the feel it between your finger tips, if it feels waxy it's defoamer.
    Dave Klish about 400 taps, down from much more. Will hold about the same for 2021
    2012 Mahindra 36 HP 4x4/ loader/cab/heat/AC:-)
    3x8 raised flue evaporator
    250 GPH converted to electric, RO by Ray Gingerich
    6.32 KW solar system, 1.48KW is battery backed up, all net metered
    website: www.cnymaple.com

  4. #4
    Join Date
    Feb 2011
    Location
    Temperance Mi
    Posts
    371

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    It's mold. If it's for personal use, I would skim it, bring it to boil and use it. It could just be a bad jar seal.

  5. #5
    Join Date
    Apr 2019
    Location
    Nashville, MI
    Posts
    345

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    I have always used mason jars and that happened to me the first year. Skim it all off and heat it up it should be okay to use. What I noticed was that particular jar looked a little short on syrup. those jars I don't store I use first. Always try to fill them within 1/2 inch of the lid and make a quick flip over of the jar then set it up to seal as normal, just like you would be doing a vegetable or fruit.
    2004 - 2012 2x3 flat pan 25 to 60 taps
    2012 2x3 new divided pan w/draw off 55 taps
    2018 - didn't boil surgery - bought new evaporator
    2019 new SML 2x4 raised flue high output evap. 65 taps
    made 17 gal syrup
    2020 - only put out 53 taps - made 16.25 gal syrup
    2021 - going for 50 bags and 50 on tubing

  6. #6
    Join Date
    Mar 2017
    Location
    Oakville, ON
    Posts
    88

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    Almost certainly mold. Mold colonies generally form in circular patterns like you have because they start with one spore and grow out evenly in all directions until they hit another colony or edge. I agree, that bottle looks a little under filled. Do you invert them after filling? Even using sterilized bottles and lids it's possible for spores to land on them before they get filled. The hot syrop will kill them if it touches them but if you dont invert then any spores on inside of lid or top edge of bottle are free to multiply! For personal use just scrape off the mold, bring syrop back up to more than 180 for 10 minutes and then use.
    2020 - 100 taps on buckets, 21L syrup from 2700L so far (FEB 26-Mar 13) and then the pandemic hit! End of our season!
    2019 - 62 taps on buckets, 95L syrop from 3215L sap
    2018 - 62 taps, collecting by hand, 90L syrop from 3200L sap
    2017 - Lapierre Waterloo Small mini pro with 40 taps, only up and running mid March so missed most of season!
    2014 - 2016 40 taps making one or two batches on a 2x6 flat pan over an open arch as it would have been done in 1900

  7. #7
    Join Date
    Mar 2019
    Location
    York County, New Brunswick
    Posts
    24

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    Thanks for the info. Just wanted to make sure if it was still ok to consume
    30 taps on Red and Sugar Maple
    Oil tank evaporator
    simple beginnings

  8. #8
    Join Date
    May 2009
    Location
    UVM Proctor Maple Research Center, Underhill Ctr, VT
    Posts
    5,372

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    Should be fine as long as it is reboiled and refiltered and nobody in the household is sensitive or allergic to mold.
    Dr. Tim Perkins
    UVM Proctor Maple Research Ctr
    http://www.uvm.edu/~pmrc
    https://mapleresearch.org
    Timothy.Perkins@uvm.edu

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