[Make a plaster mold of macrame cushion cover.]

Thank you for the comments - i will try as suggested, a much better way!

 

[Make a plaster mold of macrame cushion cover.]

7 hours ago, Jeff Longtin said:

Hello Vika,

It would appear that this is fabric, correct? In that case you need to seal the material before casting. A spray urethane would be best for that. You would probably need to apply several coats. 

Apply the urethane thick enough so you see a glossy reflection. That will tell you the fabric is sealed. 

Murphy's oil soap only works on porous materials like plaster or wood. 

As there appears to be many undercuts you may run into problems with the plaster getting stuck in the crevices. A simple way to seal those holes would be to apply a thin coat of plaster and then wipe the fabric with a sponge BEFORE the plaster sets up. Allow that layer to dry (30 minutes) Then apply a thin coat of Murphy's to the surface.

This will be a difficult thing to mold. Be prepared for a few challenges.

 

[Make a plaster mold of macrame cushion cover.]

Photo of macrame cushion cover

[Make a plaster mold of macrame cushion cover.]

I read that murphys oil soap was a good release agent.  Can someone tell me how to apply it to the macrame?  Do I spray it or brush it - brushing may allow it to absorb a lot.  Perhaps there is something more suitable.  Any comments would be most appreciated - thank  you.