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Materials Formulation Requirements for WB Folding Carton Inks

Common Additives Used in Water Based Folding Carton Inks

Common Additives Used in Water Based Folding Carton Inks

Selecting Waxes for Water Based Folding Carton Inks


The main purpose for including waxes in these formulations is to improve rub resistance. The table below will familiarize you with the different performance characteristics of waxes used with water based folding carton inks.

Raw Material Rub resistance Scratch Slip Water resistance Gloss
Polyethylene Wax ⬤⬤⬤⬤⬤
⬤⬤⬤⬤⬤
⬤⬤⬤⬤⬤
⬤◐
⬤⬤⬤

Paraffin wax

⬤◐
⬤◐
⬤◐
⬤⬤⬤⬤⬤
⬤⬤

Polypropylene Wax

⬤⬤⬤⬤⬤
⬤⬤⬤⬤⬤
⬤⬤⬤⬤⬤
⬤◐
⬤⬤⬤

Generally the larger the particle size - the greater the rub resistance, but also the greater the effect on gloss, so in general you want to formulate with the smallest particle size that gives an acceptable level of rub resistance. Paraffin waxes are used almost exclusively for imparting water resistance and shouldn’t be used unless this is a requirement.


Selection Defoamers for Water Based Folding Carton Inks


Defoamers can be categorized into silicone based defoamers and non-silicone based defoamers (e.g. mineral oil based defoamers). In general, silicone based defoamers are the most effective for eliminating foam, but they are generally restricted to being used in the pigment grinding stages of ink manufacture because they require a lot of sheer to ensure that they are fully dispersed within the ink system.

Raw Material Defoaming Miscibility Effect on gloss Things to be alert for
Silicone based ⬤⬤⬤⬤⬤
Excellent

⬤⬤
Poor
Needs high sheer
⬤⬤⬤
Moderate

Can cause surface defects in
printed film if not well
dispersed (fisheyes)

Mineral Oil based ⬤⬤⬤⬤
Good
⬤⬤⬤⬤⬤
Excellent
⬤⬤⬤⬤
Little effect

Can become solubilized over
time leading to loss of
effectiveness


Water based film inks formulation

Select Pigments for Water Based Folding Carton Inks


Raw Material Color Strength Transparency Gloss/Brilliance Heat Resistance Stability
Organic Pigments ⬤⬤⬤⬤⬤
Excellent
⬤⬤⬤⬤⬤
Excellent
⬤⬤⬤⬤⬤
Excellent
⬤⬤⬤
Moderate
⬤⬤⬤⬤⬤
Excellent
Inorganic Pigments ⬤⬤⬤⬤⬤
Excellent
⬤⬤⬤
Moderate
⬤⬤⬤⬤◐
Very Good
⬤⬤⬤⬤⬤
Excellent
⬤⬤⬤⬤⬤
Excellent
Metallic Pigments ⬤⬤⬤⬤⬤
Excellent

Poor
⬤⬤⬤⬤⬤
Excellent
⬤⬤⬤⬤◐
Very Good
⬤⬤⬤⬤◐
Must be passivated for water based inks

Select Surfactants for Water Based Folding Carton Inks


Surfactants are used to improve substrate wetting and for pigment wetting during the pigment grinding stage. The type of chemistry to use is often dictated by local availability and price. One should also consider that the more surfactant you use, the more the ink tends to form foam. Many surfactants have the effect of stabilizing foam, so it’s important to select the right surfactant for your system.


Role of Resins in Water Based Folding Carton Inks

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