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Significance and Use
5.4 This practice can be used with recirculating systems to monitor the change in volatile matter content as the test progresses. An excessive increase in volatile matter content can indicate breakdown of the fuser oil due to the combined effect of the heat of the fuser unit and the catalytic action of contaminants introduced by toner, paper, and other materials encountered in the machine. The production of excessive amounts of volatile materials may damage delicate electrical components within some copying machines.
5.5 This practice can be used with recirculating systems to monitor the change in viscosity as the test progresses. An excessive increase in the viscosity of a fuser oil can indicate that it is beginning to form a gel due to the effect of oxygen, contaminants, and high temperatures encountered in the machine.
5.6 This practice can be used with recirculating systems to monitor the change in surface tension as the test progresses. An increase in surface tension indicates loss of the release properties of the fuser oil and may lead to print offsetting and other adverse effects.
5.7 This practice can be used to evaluate the rate of fuser oil-related buildup on the fuser roll. A rubbery material that consists of gelled fuser oil, paper dust, toner, and other contaminants may build up on the fuser roll as the fuser oil degrades. Inspection of the fuser roll at specific intervals provides a qualitative evaluation of this effect.
5.9 This practice is a single estimate subject to a significant number of variables that are not measured easily. Consequently, a repeated number of tests on more than one machine will yield more reliable conclusions.
5.10 This practice may be used with recirculating systems to establish limits for acceptable change in physical properties based on data correlations. Such limits may provide more efficient evaluation of sample fuser oils and prevent damage to the copying machine by avoiding the need to test to failure.
1.7 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. For a specific precautionary statement, see 8.3.1.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D445 Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)
D1331 Test Methods for Surface and Interfacial Tension of Solutions of Surface-Active Agents
D4559 Test Method for Volatile Matter in Silicone Fluid
D4741 Test Method for Measuring Viscosity at High Temperature and High Shear Rate by Tapered-Plug Viscometer
F335 Terminology Relating to Electrostatic Imaging
F995 Practice for Estimating Toner Usage in Copiers Utilizing Dry Two-Component Developer
ICS Number Code 37.100.10 (Reproduction equipment)
UNSPSC Code 43212100(Computer printers)