that these indices were favorably influenced when Bartlett pears were 
packed in sealed films. Soluble pectin formation, loss in weight of 
the fruit, and softening were retarded by packing in this manner. 
The longer the interval of storage, the greater was the protection 
afforded “by these films. Weight losses were least in the polyethylene 
film. The storage condition ‘of the fruit in all of the films was su- 
perior to check lots packed in oiled wraps in the standard manner. 
Information on the carbon dioxide and oxygen levels encountered 
in packages of fruit sealed in various films is summarized in table 3. 
Taste 2.—/nfluence of different sealed films on certain changes in 
Bartlett pears at 31° F., by specified days in storage for 1949, 1950, 
and 1952 
| 
Year, film, and period of storage Firmness Soluble Loss aH 
pectin weight 
1949 
Pliofilm (75 FF): Pounds | Percent Percent 
SRO CL DY Sa ote erent eee ae oe | 15. 0 | 0. 039 0. 45 
CS YB FF AS eS rg a er | 14. 0 | . 036 7a 
LS By Sk PR ee Sa ee en 13. 1 . 061 . 66 
Cellophane (300 LSAT): | | 
DO GE iy Se art te te eh ad os pee a te 13. 6 | . 036 1. 26 
OGY GISTs) ia ae ea ee ae ere | 14.0 NOs PANY | 
Bes ORR RY See eee eye ope eee es Se | 13. 9 . 060 2. 56 
Check standard pack | 
ERO GD ex coat eee ett pees ey | 14. 2 . 080 3. O8 
CO Gl ay eee tee aioe UE STN | 13. 6 | O98 | 4, 52 
Bea Cam eb hy Stress eter Wg ee ae ee eae | 12.9") ETO: 6. 00 
| 
1950 | 
Pliofilm (80 FM1) | 
SAG BY Saye esas Uae eae ee eens Ae ee 16. 6 067 . 89 
ED GES Rn ee eae 16. 0 066 1252 
RO GnGh ny eset kes 15. 1 O89 ras PAS 
Pliofilm (100 FM1) | 
O35 ORNS ae Fee yee eee eae os see ee eee iSO 062 52 
FDS AG ESSAI ag a 16. 3 066 . 86 
ON CIR See ee | GS-3 076 1. 34 
Polyethylene (150) | 
OSG PS a a eee | 17. 0 | 062 22 
G2ae eye oe ae ese | 16. 2 068 32 
WOVAOr DGS tere ener ro ee | 15. 9 | O68 | 40 
Check standard pack | 
PS fini. 2a ee eee ee, 16. 3 . 067 1. 58 
GR GPE cc SLE es ee en eee eee | 15. 4 | 066 2. 83 
UVAne yun eee ee es 14. 4 | 141 4.14 
1952 | 
Polyethylene (100): | | 
PATE id = Be oR ee ee ee ee i ee hes O046:,| 2S see 
DAT TESS sa a a nee pe eee | 13. 3 | O56) )).2 2 2- eees 
atmeinyer ee Ge | 13. 4 | 100):|Sn2) 2 ee 
Check standard pack | 
er er a a 15. Si 046: fine aera 
tio Le ee 12.0 O96). |25.5 5 eee 
MURA yee ee eS eS ee 10. 2 180) se se 
SPEC aihios ro oe ee es ee eee 
342911°—55 2 7 
