MAP Comparison: Extended Shelf Life 2017-06-02T13:11:07+00:00

Project Description

MAP Comparison: Extended Shelf Life

Below are two reports. The first report shows a punched film currently used by our customer to pack Cherries. The second report is a trial that we have produced using laser perforations to optimise shelf life.

First Report – Punched Perforation

Product Start Date End Date Conditions Reason For Testing
Cherries 15/03/2017 21/03/2017 Chilled MAP Comparison

Material – PS, Format – Lidding film, Perforation type – Punch.

15/03/2017 16/03/2017 17/03/2017 20/03/2017 21/03/2017 22/03/2017
P+2 P+3 P+4 P+7 P+8 P+9
All Packs Cherries all appear okay Cherries all appear okay Cherries all appear okay Cherries appearing wrinkled but stems appear mostly green Wrinkled and stems more brown Very wrinkled with brown stalks

Additional information:

  • Observations from the punched film pack were used as a control against suggested laser perforation patterns.
  • The cherries were packed on the 13th March, and observations began on the 15th March.
  • The punched control testing ended on the 22nd March, 9 days after production, this is before the two laser trials ended.

Second Report – Laser Perforation

Product Start Date End Date Conditions Reason For Testing
Cherries 15/03/2017 23/03/2017 Chilled MAP Trials

Material – PET, Format – Lidding film, Perforation type – Laser.

15/03/2017 16/03/2017 17/03/2017 20/03/2017 21/03/2017 22/03/2017
P+2 P+3 P+4 P+7 P+8 P+9
All Packs Appearance of Cherries are okay, some browning on stems seen Appearance of Cherries are okay, some browning on stems seen Appearance of Cherries are okay, majority green stems Cherries staring to appear wrinkled Cherries staring to appear wrinkled Wrinkling seen in punnets and stems turning browner

Conclusions:

  • Cherries arrived on the 15th March, two days after production. Shelf life testing started on this date.
  • The cherries were in an okay condition at the start of testing, turning borderline with deterioration seen to be starting to occur 8 days after production, as the cherries started to appear wrinkled.
  • On the tenth day after production, the stems appeared to be turning progressively browner, the end condition of the cherries was seen to be borderline.
  • Average gas levels show that there is room to increase this pattern if necessary before causing a crossover.