<br> ##Mold making and casting, in brief. ###Making a one-part mold from an acorn.   #### Suspend acorn in cup in preparation to pour mold material.   #### Pour silicone around acorn, let it cure, then remove from cup.   #### Separate two parts of mold by cutting and tearing. Mix and pour plaster casting material.   #### Remove the plaster replica and clean it up a bit.  --- <br><br><br><br> ###Making a one-part mold from a dogwood fruit..