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POTENTIAL FOR REDUCING STYRENE EXPOSURES FROM COPIED PAPER THROUGH USE OF LOW-EMITTING TONERS
Citation:
Henschel*, D B., R. C. Fortmann, N. Roache, AND X. Liu. POTENTIAL FOR REDUCING STYRENE EXPOSURES FROM COPIED PAPER THROUGH USE OF LOW-EMITTING TONERS. Presented at Indoor Air 2002, Monterey, CA, 6/30-7/5/02.
Description:
The paper reports results of tests, conducted using 53-L chambers to determine styrene emission rates from freshly copied paper produced on a single photocopier using two toners manufactured for the copier having different styrene contents. Copied-paper styrene emissions with both toners could be represented by a power law or a 3rd-order decay model (R2=0.94 to 0.99). The two toners resulted in copied paper having significantly different styrene emissions (p less than 0.01). Unit mass emissions of styrene (micrograms/sq m) over 1000 h are predicted to be 9 times greater from paper with the higher-emitting toner. But even copied paper produced using a still-higher-emitting toner reported in the literature is predicted to produce peak indoor styrene concentrations in a typical office only 0.3% of the estimated minimum concentration of concern to susceptible subpopulations. Thus, for the toners studied here, indoor styrene exposures from copied paper appear too limited to provide incentive for switching to the lower-emitting toner.