Jeff Longtin
-
Posts
318 -
Joined
-
Last visited
Content Type
Profiles
Forums
Gallery
Status Replies posted by Jeff Longtin
-
Hello Jeff,
I saw one of your previous posts describing the ‘burnishing’ and applications of multiple coats to plaster jigger molds and I’m wondering if you could describe in further detail how to achieve a smooth plaster surface after making moulds with a cut-away template.
The reason I like using this method of making jigger molds is because it ensures a perfect centering for each individual mold rather than creating a complicated case mold. Im finding it difficult to achieve a perfectly smooth surface for my molds and I’m wondering, at what consistency and how would you apply a second or third coat of plaster on top of your mold?-
Hello Forrest.
To be able to create a smooth surface you need to burnish the plaster as soon as it is stiff. (While its still warm in other words.)
Sometimes I apply a thin coat of plaster, to fill gaps and holes, but if the surface looks good I just use water. The water/thin plaster works as a polishing agent.
With the still wet/still warm plaster form spinning on the wheel I apply a little bit of water and then apply a metal rib to the surface. I don't cover the whole surface in water...just an area in front of the rib. I then apply the metal rib to the surface and move the water with it.
There's an art to it, certainly, but after a few tries you see how much water is needed and how quickly to move the rib.
It is rewarding though. When your freshly set plaster actually reflects light you know you have a very smooth surface.
Hope that helps
Jeff
-
-
Sue and I celebrate our 50th anniversary today!
Pres
-
- Kelly in AK, Hulk and Min
-
3
- Report
-
Congrats! Thats fantastic!
