1.1 This practice describes laboratory procedures for preparing an oil-based ink resin solution in a high-boiling solvent using the Thermotronic II microprocessor-controlled varnish cooker. 1.2 These procedures are for use with ink resins intended mainly for oil-based offset and letterpress inks. The type of resins are typically, but not limited to, C9 aromatic hydrocarbon resins, modified dioyclopentadiene resins, rosin pentaerythritol or glycerine esters, phenolic-modified rosin esters, maleic anhydride modified rosin esters, and naturally occurring resins such as gilsonite. Solvents can include both petroleum derived, such as distillates, and naturally derived materials, such as vegetable oils. 1.3 To avoid fire or injury or both to the operator, these practices should not be used with flammable solvents such as toluene or xylene. The minimum flash point of the solvents used should be 60C (140F) as determined by Test Method D56. (WARNING--Users of this practice should be aware that the flash point of many other solvents used for this test [as defined in Test Methods D56 and D1310] is exceeded in the heating cycle of this practice. Take safety precautions since there is the potential for vapor ignition. Do the methods outlined in a shielded exhaust hood in which there is access to a fire extinguisher if needed.) 1.5 The values given in SI units are to be regarded as the standard. The values in parentheses are for information only. 1.6 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.
Common procedure used by ink, varnish, and ink resin manufacturers.
KeywordsThermotronic; varnish; resin; solution; ink; compatibility; dissolution; incompatible; solution
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
Draft Under Development