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Significance and Use
This practice provides a means of preparing gel vehicles in laboratory equipment that most closely resembles production reactors. It can be used to predict the performance of gel vehicle components (resins, gellants, alkyds, etc.) in the user's equipment.
An ample amount of gel vehicle can be prepared for use in preparing inks for press testing.
FIG. 1 Gel Vehicle Preparation Apparatus
1.1 This practice covers a laboratory procedure for the gelation of a resin solution, ink varnish, or vehicle using a resin kettle.
1.2 Guidance in preparing gelled vehicle samples suitable for use in laboratory sample quantity oil-based printing inks is provided.
1.3 The procedure outlined is not intended as a means of rating or evaluating resin or vehicle gelability, and is applicable only if the solutions, varnishes, or vehicles produced are of a rheology that is measurable by conventional ink and varnish industry viscometers or rheometers.
1.4 The values stated in SI units of measurement are to be regarded as the standard. The values given in parentheses are for information only.
1.5 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 prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D154 Guide for Testing Varnishes
D1545 Test Method for Viscosity of Transparent Liquids by Bubble Time Method
D1725 Practice for Preparing Resin Solutions for Viscosity Measurement by Bubble Time Method
D4040 Test Method for Rheological Properties of Paste Printing and Vehicles by the Falling-Rod Viscometer
E1 Specification for ASTM Liquid-in-Glass Thermometers
ICS Number Code 83.080.10 (Thermosetting materials)
UNSPSC Code 31211707(Varnishes)