I have a really hard time finding a D-Limolene supplier in Europe (D-Limolene is a solvent that dissolves HIPS plastic used as 3D printing material ) so my next best option is ABS . I want to print a mold core and after lamination to dissolve it , if i print in ABS i have to use acetone to dissolve it . I  must soak my core in acetone for an hour max , would this be enough to ruin my part ? I dipped a small part i made in acetone for couple of hours and i notice some small softening of the surface part but nothing major ,as far as i can see. Since i want my part to take loads i don't feel really comfortable using acetone . What is your view on this?

I FAILED MISERABLY !!! Unfortunately although ambient temperature was 22C-71,5F the exothermic reaction of resin was enough to soften PLA and vacuum pump did its job and squished the whole layup . My mistake was also that i printed my core thin wall (1,6mm ) . I don't want to try PLA one more time with thicker wall , cause if the heat from the resin is high (60C-140F) the core will soften no mater what.
So  i came to the decision i wanted to avoid in the first place : ABS  and dilution with acetone .
This time i will print a core with ABS  stick a layer of  packing tape on its surface and then wrap this frame with CF and vacuum bag it .After curing i will pour acetone in the core to dissolve the core .The packing tape is to unstick the core from the CF shell as soon as possible .
Any thoughts?
Here some pictures