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Technical Bulletin: #58
Date: September 28, 1999
Subject: Ink Expansion Due To Heat

ISSUE: INK EXPANSION DUE TO HEAT

A common occurrence with some series of plastisol inks is expansion after packaging due to exposure to summer-like temperatures that approach and exceed 100oF or 38oC. The result of this product expansion can cause the container lids to bulge and even pop off causing leakage when the container is filled above recommended fill weights. This expansion is most common with Low Bleed (ML and NH), Puffs (NP and MP) and Hot Split inks (HS).


SOLUTION:

Ink expansion will not negatively affect product performance if stirred before use to assure uniformity. Rutland packages some products in larger and/or ventilated containers to allow for expansion. A notice will be placed on each Rutland container that may be susceptible to expansion.

NOTICE: Exposure to temperatures in the 100oF (38oC) range can cause this product to expand in the pail. Prolonged exposure to these conditions may cause bulging and leakage from the pail. Opening the pail and stirring the product before use may solve the problem.

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