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The comparisons of fastness of the different coating processes of electroless silver plating on polyethylene membrane surfaces were investigated. The average fastness values of the impregnation (from 2.0 ± 0.5 in I3-1 to 4.0 ± 0.5 in I2-1), the brush (from 4.0 ± 0.3 in B3-1 to 4.5 ± 0.3 in B2-1) and the spray (from 2.0 ± 0.3 in S3-1 to 4.0 ± 0.3 in S2-1) with adding the Tollen agent first and then the D-glucose which were more efficient processes (Figure 1) on fastness were 3.2 ± 0.7 (TR-1), 4.2 ± 0.8 (TR-2) and 3.0 ± 0.6 (TR-3), compared with those of the impregnation (the average fastness value of 3.7 ± 0.7 in RT-1 from 3.5 ± 0.3 in I1-2 to 4.0 ± 0.3 in I2-2), the brush (the average fastness value of 4.5 ± 0.8 in RT-2 from 4.0 ± 0.3 in B1-2 to 4.5 ± 0.3 in B2-2) and the spray (the average fastness value of 3.3 ± 0.4 in RT-3 from 2.5 ± 0.3 in S3-2 to 4.5 ± 0.3 in S2-2) with adding the D-glucose first and then the Tollen agent, and those of the impregnation (3.5 ± 0.3 in MS-1), the brush (4.5 ± 0.5 in MS-2) and the spray (3.0 ± 0.2 in MS-3) with the mixed solutions, respectively. Meanwhile, both the fastnesses of the D-glucose firstly and then the Tollen agent (Figure 2) and the fastnesses of the mixed solutions of the Tollen agent and the D-glucose (Table II) were not much different. The highest and lowest average fastness values of coating silver by different processes were the spray processes and the brush processes, respectively. Thus, the optimized coating processes of the electroless silver plating were the spray processes by adding the Tollen reagent and then the D- glucose to promote the adhesive values between the surfaces and silver element for the human beings health and the environment safety.

Comparisons of Fastness of the Coating Processes of Electroless Silver Plating on Polyethylene Membrane Surfaces