ASTM D 6531 Standard Test Method for Relative Tinting Strength of Aqueous Ink Systems by Instrumental Measurement

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ASTM D 6531 Document Information:

Title
Standard Test Method for Relative Tinting Strength of Aqueous Ink Systems by Instrumental Measurement

ASTM International

Publication Date:
Mar 10, 2000

Scope:

This test method covers the procedure for determining the relative tinting strength of waterbased ink systems using a computer-aided spectrophotometer.

This test method is applicable to waterbased printing inks and bases to be used primarily in flexographic and gravure printing applications.

This test method applies only to single, non-fluorescent pigmented colors and black ink systems for which there is a reference standard containing a pigment of the identical color index name and number.

The procedure in this test method specifies placing tinted samples in a cuvette for spectrophotometric measurements. The use of thick wet drawdowns as in Test Methods D 2066 are inappropriate due to severe floating problems with aqueous systems.

The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations.

Keywords:

aqueous printing inks

colorimeter

Kubelka-Munk equation

printing inks

spectrophotometer

tinting strength

waterbased ink systems

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