Provided is weld-obscuring, thermoplastic resin composition which when suitably molded substantially obscures the appearance of weld lines. The resin composition is made of a thermoplastic resin, about 0.01 to about 15.0 wt. % of a weld-obscuring agent having a refractive index greater than the refractive index of the thermoplastic resin in the visible light range, and about 0.1 to about 8 wt. % of glitter material having an average particle size in the range of about 5 to about 120 .mu.m. X is between (10.6-(Y/11.4 .mu.m)) wt. % and about 0.1 wt. % when Y.gtoreq.30 .mu.m, and when Y is