Because Polyguard's specially formulated polypropylene has a physical density that is less than other sleeving materials it is more pliable and gentle to the film.

STRONG AND DURABLE
Polyguard products have excellent tensile strength. They will not become brittle or abrade your film over time.

SUPERIOR CLARITY
Polyguard sleeving is color neutral and is so optically clear that when read with a photo densitometer it has a .002 log density.

ANTI-NEWTON RING
Unlike other sleeving materials, Polyguard sleeves have a unique anti-newton ring surface. This eliminates unsightly and distracting newton rings.

 

SLEEVING
CHARACTERISTICS

 POLYGUARD Sleeving
Polypropylene		 POLYESTER
Sleeving		 ACETATE
Sleeving		 PVC vinyl
Sleeving		 POLYETHYLENE
Sleeving
Film Viewing Clarity Very Good Very Good Very Good Very Good Poor
Optical Log Density .02 .04 .03 .03 .04
Newton Rings Anti-newton ring Yes Yes Yes No
Color Neutrality Very Good Very Good Very Good Very Good N/A
Archival References Approved (ISO, ANSI) Approved (Cautions) Not Approved Not Approved Approved (ISO, ANSI)
Cost Comparison Low High High Low Low
Float Test Results Floats Sinks Sinks Sinks Floats

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