TECHNICAL INFO




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Chemical resistance
Just like light, certain chemicals can cause alterations in prints:
Either by direct degradation of the print in contact with the product.
Or by migration of an ingredient into the ink.

A print is considered to be resistant to a chemical substance when no alteration occurs when it is brought into contact with it, in other words when no change in colour, no leaching, no reduction in the abrasion or scratch resistance of the film is observed.

Chemical resistance is assessed on a scale graduated from 1 to 5.
Did you know?
Alcohol and alkali resistances are indicated on our labels by “+” and “-” signs.
The “+” sign signifies excellent or good resistance (value 5 or 4), whereas the “-” sign signifies the opposite:
5 : Excellent resistance +
4 : Good resistance +
3 : Average resistance -
2 : Low resistance -
Several different standards are used to evaluate the resistance of printed material to various agents:

ISO 2836:
Graphic technology — Prints and printing inks – Assessment of the resistance of prints to various agents.

ISO 2837 (NF Q 64-004):
Graphic technology — Prints and printing inks – Assessment of resistance to solvents.
(This standard is used as the basis for determining the resistance to alcohols and nitrocellulose based solvents)

ISO 2838 (NF Q 64-005):
Graphic technology — Prints and printing inks – Assessment of resistance to alkalis. 

ISO 2839 (NF Q 64-006):
Graphic technology — Prints and printing inks – Assessment of resistance to soaps.

ISO 2840 (NF Q 64-007):
Graphic technology — Prints and printing inks – Assessment of resistance to detergents.

ISO 2842 (NF Q 64-009):
Graphic technology — Prints and printing inks – Assessment of resistance to food grade oils and fats.

ISO 2843 (NF Q 64-010):
Graphic technology — Prints and printing inks – Assessment of resistance to waxes and paraffins.
Did you know?
Resistance to alcohols and nitrocellulose solvents (mixture of ethanol, ethoxy propanol and ethyl acetate) indicates that the prints may be varnished with alcohol, cellulose, acrylic and UV varnishes.
Resistance to alkalis concerns prints that can come into contact with detergents (labels, cardboard boxes, etc.) or certain alkali adhesives (labels, posters, etc.).
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