How can possible foaming of EXCEVAL™ solutions be prevented during solving and application?
Adding 10% isopropanol to Exceval will considerably reduce the foam formation in the dissolving vessel. The subsequent addition of IPA reduces the foam formation on the gravure rolls. IPA will also significantly improve the wetting of EXCEVAL™ on the plastic substrate. Furthermore, reducing the viscosity of the EXCEVAL™ solution contributes to a reduction of the foam formation on the gravure rolls.
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