Surface hardness value is a commonly used indicator for describing the mechanical property of stereolithography
parts. In order to investigate colorants how to influence the surface hardness of colorful resin
component, a procedure is proposed to fabricate testing specimens based on color stereolithography technology
in this study. Liquid photosensitive resin LPR2001 is mixed with two colorants (phthalocyanine blue and eosin
powder) respectively before curing. The phthalocyanine blue powder is insoluble and only dispersive in the solidliquid
mixture which results in deposits. Therefore, surface modification is conducted to the phthalocyanine blue
powder for improving wettability. By contrast, the eosin powder is dissoluble and does not cause any deposits in
the liquid resin. Specimens are produced by laser curing colored resin and tested by MTSR Nano Indenter XP
system. The change of hardness values is illustrated at certain mass percentages of colorant. Comparisons and
discussions are carried out to explain the colorants’ effect. It is concluded that incorporating colorant to liquid
resin results in decreasing the surface hardness of components. But sensibilization effect of the colorants also
influences the curing process. Surface modification to the phthalocyanine blue powder is a feasible method to
increase the hardness value of color stereolithography components. Dissolvable eosin has an approximate linear
effect on surface hardness.
GONG Hai-jun (宫海军), WANG Mao-lu* (王懋露), WANG Yang (王 扬)
. Surface Hardness Evaluation of Components Made by Color Stereolithography[J]. Journal of Shanghai Jiaotong University(Science), 2013
, 18(6)
: 738
-741
.
DOI: 10.1007/s12204-013-1459-1
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