Michem® In-Line Primer Q4325A

Brand Family Overview

VaporCoat® recyclable water-based coatings confer high barrier to paper-based packaging and wraps. Most VaporCoat grades are designed for “low MVTR”, to retard water vapor transmission in order to keep perishables fresh, frozen goods intact, or sensitive contents in factory condition. In response to market interest for greater food safety and preservation, additional VaporCoat products can inhibit contaminants ordinarily found in recycled paper from migrating into packaged dry food.

See more VaporCoat products.


Designed as a primer for HP Indigo substrates to render them compatible to ink. It can be used on uncoated paper substrates on the in-line priming unit on the W7200 press.


Print receptive primer

Performance Attributes

This product is used in many applications including the following:

ApplicationProperties Imparted
HP Indigo SolutionsApplicator - Indigo ILP station, OEM - Indigo ws7200, Substrate - paper

See more products recommended for HP Indigo Solutions.
Physical Properties

These physical properties are typical but should not be considered specifications.

AppearanceTranslucent liquid
pH10.4 - 11.4

Site of Manufacture (and Product Code)

AUB (Q4325A.E)
SNG (Q4325A.S)

Application Data

Michem® In-Line Primer Q4325A can be applied using the in-line primer unit on the W7200 press. The recommended dry coat weight is 30 to 60 mg/m². Use our Sapphire Indicator Solution to check quality of the coating. The anilox should be turning at all times to avoid premature drying of the solution. Cleaning with warm water, IPA or slightly acidic water is recommended. ISO Cup Viscosity #3 Cup, 33-43 sec. Do not dilute.


Ensure adequate ventilation. Handle in accordance with good industrial hygiene and safety practice. Wear personal protective equipment.