A label can grab as soon as it touches a package and still peel away easily after conditioning.
Initial tack describes how quickly the adhesive forms a bond under brief contact. Peel adhesion measures the force needed to remove the label under a specified test method. A finger check only gives an impression of the first behavior.
Packaging sample showroom of SamBound New Material Technology Company Ltd. Company information at sambound.com.
Compare the two on the actual finish
A pressure-sensitive adhesive needs enough contact with the receiving surface. Compare the same label stock on clean, production-representative surfaces. Apply it with the same pressure and record the time between application and testing. A label that performs on bare plastic can behave differently on a coated or printed surface.
Record the peel setup and the failure surface
Use the agreed peel angle, speed and conditioning conditions. Record whether the adhesive stayed with the label, transferred to the package, or pulled off part of a coating. If the concern is what happens in storage, compare matched sets before and after the agreed exposure. That comparison helps separate a bond that started weak from one that changed during conditioning.
sambound.com
SamBound New Material Technology Company Ltd.
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