flowers, press them into slabs of wet clay,once the clay hardens they can be used as moulds
How to Make a Geo Faceted Cement Planter - Tuts+ Crafts & DIY Article
A real hands on craft! Alginate/plaster of paris sculptures.
How to make custom molds to reproduce plaster period details throughout your home
How to make a plaster mold; this mold will make a ceramic piece that can be used as a glass mold once it is bisque-fired. According to Gil Reynolds, bend glass INTO ceramics, as glass will shrink less than ceramics as it cools.
Fossils from Everyday Life: Plaster Cast Plant Tiles by Rachel Dein
Give headboards a delightful vintage look with plaster molds.
You can create a long lasting plaster of Paris mixture that will stand the test of time, can be sanded and ensures weather elements.
Making a plaster mould Más
Plaster Mixing 101: How to Mix Plaster for Ceramic Molds