DigiPrime® 4450

Brand Family Overview

DigiGuard® aqueous and UV curable overprint varnishes protect and enhance the appearance of printed materials. Various grades are available for commercial print jobs; form, fill and seal packaging; and food contact applications.

See more DigiGuard products.


A ready to use primer which provides excellent adhesion of HP Indigo ElectroInks® to most films and papers. It has exceptional anti-block properties and can be used for two sided printing. It also has food contact approval.


Print receptive primer for HP Indigo ElectroInks®.

Performance Attributes

This product is used in many applications including the following:

ApplicationProperties Imparted
HP Indigo SolutionsApplicator - flexo / gravure/ roll, OEM - Indigo various presses, Substrate - film, Substrate - paper

See more products recommended for HP Indigo Solutions.
Physical Properties

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

AppearanceWhite, translucent liquid
pH8.0 - 10.0
Percent Non-Volatile30.0 - 32.0
Brookfield Viscosity (cps, mPa·s) <100
Spindle Number1

Site of Manufacture (and Product Code)

CIN (DP4450)
AUB (DP4450.E)
SNG (DP4450.S)

Application Data

DigiPrime® 4450 may be applied by flexo or gravure coating systems. Recommended application rate for films is between 0.5 to 0.2 gsm dry coat weight. For paper, slightly higher weights will be needed to overcome the absorption of the substrate, this will vary from paper to paper but dry weights around 0.7 to 1 gsm are recommended. EZ Cup Viscosity - #2 Cup, 22 - 24 sec.